Features
Promote purple sweet potato
By Prof. Kirthi Tennakone
The sweet potato is probably the oldest cultivated crop. Native to tropical America, Peruvians grew it 8,000 years ago. Colombus introduced sweet potatoes to Europe; later the Spanish and Portuguese dispersed the species in Asia and Africa. Today, sweet potato is one of the staple foods that alleviate starvation and malnutrition in many parts of the globe.
In the tropics, sweet potatoes produce more food per hectare than any other cultivation. Being drought – resistant and requiring minimal irrigation, fertilizer and pesticide inputs, the crop would be a promise for the world confronted by climate change.
There are highly nutritious varieties of sweet potatoes, of which sweet potato with bright purple flesh; rich in disease-fighting agents, vitamins, minerals and fiber is emerging as a superfood – chosen as the vegetable of the year 2024 by Veganuary (the organization that promotes vegetarianism by abstaining from eating animal-based food in the month of January, every year)
The sweet potato stands out as the first genetically modified vegetable people have unknowingly consumed for millennia. The modification was done not by humans, but by a bacterium found in soil. The ancestor of sweet potatoes was a creeper belonging to the Morning Glory family (Convalesce). Thousands of years ago microbe named Agrobacterium transferred a portion of its DNA (a gene) into the genome of a plant of the original kind in Ecuador, favourably altering its characteristics. In the modified plant, roots were enlarged to yield giant tubers, storing starch, proteins, minerals, water and a host of other beneficial substances. Naturally, the genetically engineered variety withstood harsh conditions and survived better. Noting the exceptional food value, South American farmers domesticated the transgenic species. The rise of Mayan and Aztec civilizations owes much to the sweet potato. Transgenic crops can do wonders!
Today, thousands of cultivars of sweet potato exist, generally described by the colour of the skin and flesh of the yam. The skin colours of white, brown, pink, yellow and purple are common, and the flesh colours vary from white, yellow and orange to purple. These colours originate from two types of pigments known as carotenes and anthocyanins.
Apart from chlorophyll, which imparts green colour to leaves, plants carry two other pigment types: carotenes yellowish orange in colour and anthocyanins displaying hues ranging from red to blue. As we all know, in leaves chlorophyll harvests sunlight and utilizes trapped energy to fix carbon dioxide synthesizing carbohydrates. Carotene and anthocyanins, present in leaves and other plant tissue play an important role in photosynthesis and other plant biochemical processes and give conspicuous colours to flowers, fruits and yams.
Nowadays, people are told to eat coloured vegetables and fruits, because carotenes and anthocyanins have numerous health benefits, including the prevention of cancer, heart disease, diabetes and dementia. What is the secret of coloured produce? A condition that greatly contributes to the above complications is oxidative stress, a side effect of the indispensable oxygen we continuously breathe. Oxygen burns carbohydrates and fat in our bodies, liberating energy and releasing water and carbon dioxide. However, this chemical reaction creates highly reactive molecular species, known as free radicals. Free radicals damage DNA and attack cellular tissue, causing disease and aging. Fortunately, there are agents called antioxidants that scavenge free radicals before they do any harm. Carotenes and anthocyanins act as superb antioxidants.
Current research reveals anthocyanins, the red and blue pigments in vegetables and fruits have a myriad of health benefits because they are water soluble and transmissible throughout the body after absorption from the gut. They effectively quench free radicals, reducing DNA and cellular damage – a primary cause of cancer and inflammatory diseases. Anthocyanins cross the blood-brain barrier and possess a protective action against neurodegenerative cognitive impairments such as Parkinsonism and Alzheimer’s disease. With the increase in human longevity, these illnesses pose a major health issue for which no curative treatments are available. Recent investigations provide evidence for the beneficial effect of consuming anthocyanins rich vegetables in reducing the risk of developing these debilitating conditions.
The brilliantly coloured purple sweet potatoes are gaining recognition as a superfood because of the exceptionally high anthocyanin content, and the remarkable stability of the pigment and its resistance to cooking. The Spanish seemed to have collected this special variety of sweet potatoes from the Aztecs in Peru and planted it in the Philippines around the 1400s and from there, it spread to China and Japan. The climate on the island of Okinawa was ideal for sweet potatoes, a staple food for the islanders, who preferred the purple variety. Okinawans obtain more than 50% of their calorie requirements from sweet potatoes. The incidence of cancer, heart disease and dementia stand remarkably low in this land and people live relatively long compared to other regions of the world. Are purple sweet potatoes the secret of Okinawan longevity and healthiness?
Of course, other factors such as lifestyle and assortments in the diet would contribute to the good health and longevity of the people of Okinawa. As more and more studies confirm the consumption of purple sweet potatoes is indeed an important cause, the world is rushing to cultivate this crop and promote its consumption.
Purple-fleshed sweet potatoes are rare in Sri Lanka. The farmers and consumers are largely unaware of its value.
The author was fascinatingly attracted to purple sweet potato, because of his interest in anthocyanin pigments, which he used to demonstrate a novel solar cell concept for the first time now pursued worldwide. He successfully grew this plant in his home garden, Hantana, Kandy, and obtained a good yield; some tubers weighed more than a kilo. Purple sweet prefers colder night temperatures. Our Central Highlands are probably best suited to cultivating this crop. He wishes Sri Lankans will cultivate this crop and promote its consumption.
(The author is a theoretical physicist, formerly working at the Institute of Fundamental Studies, Sri Lanka. He can be reached via email: ktenna@yahoo.co.uk)
Features
Rebuilding the country requires consultation
A positive feature of the government that is emerging is its responsiveness to public opinion. The manner in which it has been responding to the furore over the Grade 6 English Reader, in which a weblink to a gay dating site was inserted, has been constructive. Government leaders have taken pains to explain the mishap and reassure everyone concerned that it was not meant to be there and would be removed. They have been meeting religious prelates, educationists and community leaders. In a context where public trust in institutions has been badly eroded over many years, such responsiveness matters. It signals that the government sees itself as accountable to society, including to parents, teachers, and those concerned about the values transmitted through the school system.
This incident also appears to have strengthened unity within the government. The attempt by some opposition politicians and gender misogynists to pin responsibility for this lapse on Prime Minister Dr Harini Amarasuriya, who is also the Minister of Education, has prompted other senior members of the government to come to her defence. This is contrary to speculation that the powerful JVP component of the government is unhappy with the prime minister. More importantly, it demonstrates an understanding within the government that individual ministers should not be scapegoated for systemic shortcomings. Effective governance depends on collective responsibility and solidarity within the leadership, especially during moments of public controversy.
The continuing important role of the prime minister in the government is evident in her meetings with international dignitaries and also in addressing the general public. Last week she chaired the inaugural meeting of the Presidential Task Force to Rebuild Sri Lanka in the aftermath of Cyclone Ditwah. The composition of the task force once again reflects the responsiveness of the government to public opinion. Unlike previous mechanisms set up by governments, which were either all male or without ethnic minority representation, this one includes both, and also includes civil society representation. Decision-making bodies in which there is diversity are more likely to command public legitimacy.
Task Force
The Presidential Task Force to Rebuild Sri Lanka overlooks eight committees to manage different aspects of the recovery, each headed by a sector minister. These committees will focus on Needs Assessment, Restoration of Public Infrastructure, Housing, Local Economies and Livelihoods, Social Infrastructure, Finance and Funding, Data and Information Systems, and Public Communication. This structure appears comprehensive and well designed. However, experience from post-disaster reconstruction in countries such as Indonesia and Sri Lanka after the 2004 tsunami suggests that institutional design alone does not guarantee success. What matters equally is how far these committees engage with those on the ground and remain open to feedback that may complicate, slow down, or even challenge initial plans.
An option that the task force might wish to consider is to develop a linkage with civil society groups with expertise in the areas that the task force is expected to work. The CSO Collective for Emergency Relief has set up several committees that could be linked to the committees supervised by the task force. Such linkages would not weaken the government’s authority but strengthen it by grounding policy in lived realities. Recent findings emphasise the idea of “co-production”, where state and society jointly shape solutions in which sustainable outcomes often emerge when communities are treated not as passive beneficiaries but as partners in problem-solving.
Cyclone Ditwah destroyed more than physical infrastructure. It also destroyed communities. Some were swallowed by landslides and floods, while many others will need to be moved from their homes as they live in areas vulnerable to future disasters. The trauma of displacement is not merely material but social and psychological. Moving communities to new locations requires careful planning. It is not simply a matter of providing people with houses. They need to be relocated to locations and in a manner that permits communities to live together and to have livelihoods. This will require consultation with those who are displaced. Post-disaster evaluations have acknowledged that relocation schemes imposed without community consent often fail, leading to abandonment of new settlements or the emergence of new forms of marginalisation. Even today, abandoned tsunami housing is to be seen in various places that were affected by the 2004 tsunami.
Malaiyaha Tamils
The large-scale reconstruction that needs to take place in parts of the country most severely affected by Cyclone Ditwah also brings an opportunity to deal with the special problems of the Malaiyaha Tamil population. These are people of recent Indian origin who were unjustly treated at the time of Independence and denied rights of citizenship such as land ownership and the vote. This has been a festering problem and a blot on the conscience of the country. The need to resettle people living in those parts of the hill country which are vulnerable to landslides is an opportunity to do justice by the Malaiyaha Tamil community. Technocratic solutions such as high-rise apartments or English-style townhouses that have or are being contemplated may be cost-effective, but may also be culturally inappropriate and socially disruptive. The task is not simply to build houses but to rebuild communities.
The resettlement of people who have lost their homes and communities requires consultation with them. In the same manner, the education reform programme, of which the textbook controversy is only a small part, too needs to be discussed with concerned stakeholders including school teachers and university faculty. Opening up for discussion does not mean giving up one’s own position or values. Rather, it means recognising that better solutions emerge when different perspectives are heard and negotiated. Consultation takes time and can be frustrating, particularly in contexts of crisis where pressure for quick results is intense. However, solutions developed with stakeholder participation are more resilient and less costly in the long run.
Rebuilding after Cyclone Ditwah, addressing historical injustices faced by the Malaiyaha Tamil community, advancing education reform, changing the electoral system to hold provincial elections without further delay and other challenges facing the government, including national reconciliation, all require dialogue across differences and patience with disagreement. Opening up for discussion is not to give up on one’s own position or values, but to listen, to learn, and to arrive at solutions that have wider acceptance. Consultation needs to be treated as an investment in sustainability and legitimacy and not as an obstacle to rapid decisionmaking. Addressing the problems together, especially engagement with affected parties and those who work with them, offers the best chance of rebuilding not only physical infrastructure but also trust between the government and people in the year ahead.
by Jehan Perera
Features
PSTA: Terrorism without terror continues
When the government appointed a committee, led by Rienzie Arsekularatne, Senior President’s Counsel, to draft a new law to replace the Prevention of Terrorism Act (PTA), as promised by the ruling NPP, the writer, in an article published in this journal in July 2025, expressed optimism that, given Arsekularatne’s experience in criminal justice, he would be able to address issues from the perspectives of the State, criminal justice, human rights, suspects, accused, activists, and victims. The draft Protection of the State from Terrorism Act (PSTA), produced by the Committee, has been sharply criticised by individuals and organisations who expected a better outcome that aligns with modern criminal justice and human rights principles.
This article is limited to a discussion of the definition of terrorism. As the writer explained previously, the dangers of an overly broad definition go beyond conviction and increased punishment. Special laws on terrorism allow deviations from standard laws in areas such as preventive detention, arrest, administrative detention, restrictions on judicial decisions regarding bail, lengthy pre-trial detention, the use of confessions, superadded punishments, such as confiscation of property and cancellation of professional licences, banning organisations, and restrictions on publications, among others. The misuse of such laws is not uncommon. Drastic legislation, such as the PTA and emergency regulations, although intended to be used to curb intense violence and deal with emergencies, has been exploited to suppress political opposition.
International Standards
The writer’s basic premise is that, for an act to come within the definition of terrorism, it must either involve “terror” or a “state of intense or overwhelming fear” or be committed to achieve an objective of an individual or organisation that uses “terror” or a “state of intense or overwhelming fear” to realise its aims. The UN General Assembly has accepted that the threshold for a possible general offence of terrorism is the provocation of “a state of terror” (Resolution 60/43). The Parliamentary Assembly of the Council of Europe has taken a similar view, using the phrase “to create a climate of terror.”
In his 2023 report on the implementation of the UN Global Counter-Terrorism Strategy, the Secretary-General warned that vague and overly broad definitions of terrorism in domestic law, often lacking adequate safeguards, violate the principle of legality under international human rights law. He noted that such laws lead to heavy-handed, ineffective, and counterproductive counter-terrorism practices and are frequently misused to target civil society actors and human rights defenders by labelling them as terrorists to obstruct their work.
The United Nations Office on Drugs and Crime (UNODC) has stressed in its Handbook on Criminal Justice Responses to Terrorism that definitions of terrorist acts must use precise and unambiguous language, narrowly define punishable conduct and clearly distinguish it from non-punishable behaviour or offences subject to other penalties. The handbook was developed over several months by a team of international experts, including the writer, and was finalised at a workshop in Vienna.
Anti-Terrorism Bill, 2023
A five-member Bench of the Supreme Court that examined the Anti-Terrorism Bill, 2023, agreed with the petitioners that the definition of terrorism in the Bill was too broad and infringed Article 12(1) of the Constitution, and recommended that an exemption (“carve out”) similar to that used in New Zealand under which “the fact that a person engages in any protest, advocacy, or dissent, or engages in any strike, lockout, or other industrial action, is not, by itself, a sufficient basis for inferring that the person” committed the wrongful acts that would otherwise constitute terrorism.
While recognising the Court’s finding that the definition was too broad, the writer argued, in his previous article, that the political, administrative, and law enforcement cultures of the country concerned are crucial factors to consider. Countries such as New Zealand are well ahead of developing nations, where the risk of misuse is higher, and, therefore, definitions should be narrower, with broader and more precise exemptions. How such a “carve out” would play out in practice is uncertain.
In the Supreme Court, it was submitted that for an act to constitute an offence, under a special law on terrorism, there must be terror unleashed in the commission of the act, or it must be carried out in pursuance of the object of an organisation that uses terror to achieve its objectives. In general, only acts that aim at creating “terror” or a “state of intense or overwhelming fear” should come under the definition of terrorism. There can be terrorism-related acts without violence, for example, when a member of an extremist organisation remotely sabotages an electronic, automated or computerised system in pursuance of the organisation’s goal. But when the same act is committed by, say, a whizz-kid without such a connection, that would be illegal and should be punished, but not under a special law on terrorism. In its determination of the Bill, the Court did not address this submission.
PSTA Proposal
Proposed section 3(1) of the PSTA reads:
Any person who, intentionally or knowingly, commits any act which causes a consequence specified in subsection (2), for the purpose of-
(a) provoking a state of terror;
(b) intimidating the public or any section of the public;
(c) compelling the Government of Sri Lanka, or any other Government, or an international organisation, to do or to abstain from doing any act; or
(d) propagating war, or violating territorial integrity or infringing the sovereignty of Sri Lanka or any other sovereign country, commits the offence of terrorism.
The consequences listed in sub-section (2) include: death; hurt; hostage-taking; abduction or kidnapping; serious damage to any place of public use, any public property, any public or private transportation system or any infrastructure facility or environment; robbery, extortion or theft of public or private property; serious risk to the health and safety of the public or a section of the public; serious obstruction or damage to, or interference with, any electronic or automated or computerised system or network or cyber environment of domains assigned to, or websites registered with such domains assigned to Sri Lanka; destruction of, or serious damage to, religious or cultural property; serious obstruction or damage to, or interference with any electronic, analogue, digital or other wire-linked or wireless transmission system, including signal transmission and any other frequency-based transmission system; without lawful authority, importing, exporting, manufacturing, collecting, obtaining, supplying, trafficking, possessing or using firearms, offensive weapons, ammunition, explosives, articles or things used in the manufacture of explosives or combustible or corrosive substances and biological, chemical, electric, electronic or nuclear weapons, other nuclear explosive devices, nuclear material, radioactive substances, or radiation-emitting devices.
Under section 3(5), “any person who commits an act which constitutes an offence under the nine international treaties on terrorism, ratified by Sri Lanka, also commits the offence of terrorism.” No one would contest that.
The New Zealand “carve-out” is found in sub-section (4): “The fact that a person engages in any protest, advocacy or dissent or engages in any strike, lockout or other industrial action, is not by itself a sufficient basis for inferring that such person (a) commits or attempts, abets, conspires, or prepares to commit the act with the intention or knowledge specified in subsection (1); or (b) is intending to cause or knowingly causes an outcome specified in subsection (2).”
While the Arsekularatne Committee has proposed, including the New Zealand “carve out”, it has ignored a crucial qualification in section 5(2) of that country’s Terrorism Suppression Act, that for an act to be considered a terrorist act, it must be carried out for one or more purposes that are or include advancing “an ideological, political, or religious cause”, with the intention of either intimidating a population or coercing or forcing a government or an international organisation to do or abstain from doing any act.
When the Committee was appointed, the Human Rights Commission of Sri Lanka opined that any new offence with respect to “terrorism” should contain a specific and narrow definition of terrorism, such as the following: “Any person who by the use of force or violence unlawfully targets the civilian population or a segment of the civilian population with the intent to spread fear among such population or segment thereof in furtherance of a political, ideological, or religious cause commits the offence of terrorism”.
The writer submits that, rather than bringing in the requirement of “a political, ideological, or religious cause”, it would be prudent to qualify proposed section 3(1) by the requirement that only acts that aim at creating “terror” or a “state of intense or overwhelming fear” or are carried out to achieve a goal of an individual or organisation that employs “terror” or a “state of intense or overwhelming fear” to attain its objectives should come under the definition of terrorism. Such a threshold is recognised internationally; no “carve out” is then needed, and the concerns of the Human Rights Commission would also be addressed.
by Dr. Jayampathy Wickramaratne
President’s Counsel
Features
ROCK meets REGGAE 2026
We generally have in our midst the famous JAYASRI twins, Rohitha and Rohan, who are based in Austria but make it a point to entertain their fans in Sri Lanka on a regular basis.
Well, rock and reggae fans get ready for a major happening on 28th February (Oops, a special day where I’m concerned!) as the much-awaited ROCK meets REGGAE event booms into action at the Nelum Pokuna outdoor theatre.
It was seven years ago, in 2019, that the last ROCK meets REGGAE concert was held in Colombo, and then the Covid scene cropped up.

Chitral Somapala with BLACK MAJESTY
This year’s event will feature our rock star Chitral Somapala with the Australian Rock+Metal band BLACK MAJESTY, and the reggae twins Rohitha and Rohan Jayalath with the original JAYASRI – the full band, with seven members from Vienna, Austria.
According to Rohitha, the JAYASRI outfit is enthusiastically looking forward to entertaining music lovers here with their brand of music.
Their playlist for 28th February will consist of the songs they do at festivals in Europe, as well as originals, and also English and Sinhala hits, and selected covers.
Says Rohitha: “We have put up a great team, here in Sri Lanka, to give this event an international setting and maintain high standards, and this will be a great experience for our Sri Lankan music lovers … not only for Rock and Reggae fans. Yes, there will be some opening acts, and many surprises, as well.”

Rohitha, Chitral and Rohan: Big scene at ROCK meets REGGAE
Rohitha and Rohan also conveyed their love and festive blessings to everyone in Sri Lanka, stating “This Christmas was different as our country faced a catastrophic situation and, indeed, it’s a great time to help and share the real love of Jesus Christ by helping the poor, the needy and the homeless people. Let’s RISE UP as a great nation in 2026.”
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