Vulnerability of Sri Lanka Tea Production to Global Climate Change

Wijeratne, M. A.

doi:10.1007/978-94-017-1053-4_8

Cited by 49 publications

(60 citation statements)

References 3 publications

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“…Among the abiotic stresses drought is one of the major threat that adversely affect the plant growth and yield all over the world (Stephen and Carr 1989). The manufactured tea is potential source of readily available beverage worldwide but its production is much more prone to environmental changes (Stephen and Carr 1989;Wijeratne 1996;Ng´etich 2000). Under prolonged dry weather conditions, growth of tea is adversely affected by plant water deficits created by lack of soil moisture and associated high saturation vapour pressure deficit of the air (Stephen and Carr 1989).…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Antioxidants and ROS scavenging ability in ten Darjeeling tea clones may serve as markers for selection of potentially adapted clones against abiotic stress

Dasgupta

Biswas

Kumar

et al. 2013

Physiol Mol Biol Plants

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Ten Darjeeling tea clones (BT15/263, RR17/144, B777, T253, B157, Sundaram, HV39, AV2, K1/1 and TTV1) were collected from the experimental garden of Darjeeling Tea Research and Development Centre, Kurseong. Total phenol, flavonoids and two antioxidating enzymes (peroxidase and superoxide dismutase) were estimated. The total phenol ranged between 241 and 28 GAE mg g −1 of leaf dry weight. The highest amount obtained in four clones, B15/263 (241.47), RR17/144 (221.2), B777 (154.54) and B157 (140.23 mg g −1 ). Flavonoids were estimated as Catechin equivalent (CE) and ranged between 56.88 and 20.81 CE mg g −1 leaf dry weight. Higher amounts occurred in BT15/263 (56.88 mg g −1 ), B777 (56.69) and RR17/144 (48.63). Antioxidant activities were measured following DPPH and ABTS free radicle scavenging procedures and the results were well according to total polyphenol content among the clones (in total phenols, ranges of correlation in DPPH assay were r 2 =0.990-0.989, p≤0.05; in flavonoids r 2 =0.954, p≤0.01-0.987, p≤0.05). Similarly, ABTS percent scavenging results were quiet significant. The IC 50 values were determined for both DPPH and ABTS assay. PAGE expressions of isoforms in two antioxidative enzymes and quantification of them also varied much among the investigated clones. The incidence of total phenols, flavonoids, PRX and SOD and ROS scavenging assay in in-situ condition, might be used as biochemical markers towards the superior adaptability against abiotic stress. In the present work, four clones (B15/263, B777, RR17/144 and B157) would be designated as comparatively better suited to the predicted abiotic stress.

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Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Antioxidants and ROS scavenging ability in ten Darjeeling tea clones may serve as markers for selection of potentially adapted clones against abiotic stress

Dasgupta

Biswas

Kumar

et al. 2013

Physiol Mol Biol Plants

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“…The rising T a triggers a variety of changes in the atmosphere leading to modified rainfall patterns, evapotranspiration rates and VPD. Because of the close relationships between tea yield and these atmospheric variables, long-term climate change is likely to cause significant impacts on the key physiological and developmental processes that determine the yield and yield components of tea (Wijeratne 1996). Both positive and negative responses to different components of climate change can be observed.…”

Section: Effect Of Global Climate Changes On Tea Productionmentioning

confidence: 99%

Environmental and nutritional requirements for tea cultivation

Hajiboland

2017

Folia Horticulturae

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Tea (Camellia sinensis) is an important beverage crop cultivated in the tropics and subtropics under acid soil conditions. Increased awareness of the health-promoting properties of the tea beverage has led to an increase in its level of consumption over the last decades. Tea production contributes significantly to the economy of several tea-cultivating countries in Asia and Africa. Environmental constrains, particularly water deficiency due to inadequate and/or poorly distributed rainfall, seriously limit tea production in the majority of tea-producing countries. It is also predicted that global climate change will have a considerable adverse impact on tea production in the near future. Application of fertilizers for higher production and increased quality and quantity of tea is a common agricultural practice, but due to its environmental consequences, such as groundwater pollution, the rate of fertilizer application needs to be reconsidered. Cultivation of tea under humid conditions renders it highly susceptible to pathogens and pest attacks. Application of pesticides and fungicides adversely affects the quality of tea and increases health risks of the tea beverage. Organic cultivation as an agricultural practice without using synthetic fertilizers and other chemical additives such as pesticides and fungicides is a sustainable and eco-friendly approach to producing healthy tea. A growing number of tea-producing countries are joining organic tea cultivation programmes in order to improve the quality and to maintain the health benefits of the tea produced.Ke y wor d s: aluminium, global climate change, nitrogen fertilizers, organic culture, phosphorus fertilizers, soil pH, water deficiency Abbreviations: C a -atmospheric CO 2 concentration, T a -atmospheric temperature, ESTs -estimated sequence tags, N sh -harvestable shoot density, W sh -harvestable shoot weight, C i -intracellular CO 2 concentration, T l -leaf temperature, P max -maximum photosynthetic rate, T m -maximum temperature, P n -net photosynthetic rate, T o -optimum temperature, PAR -photosynthetic active radiation, ROS -reactive oxygen species, SER -shoot extension rate, SRC -shoot replacement cycle, T s -soil temperature, SWD -soil water deficit, g s -stomatal conductance, SSH technique -suppression subtractive hybridization technique, T t -threshold temperature, TE -transpiration efficiency, VPD -vapour pressure deficit, WUE -water use efficiency

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“…Agriculture Production of rice, maize and wheat in the past few decades has declined in many parts of Asia due to increasing water stress, arising partly from increasing temperatures, increasing frequency of El Niño events and reductions in the number of rainy days (Wijeratne, 1996;Agarwal et al, 2000;Jin et al, 2001;Fischer et al, 2002a;Tao et al, 2003aTao et al, , 2004. [WGII 10.2.4.1]…”

Section: 222mentioning

confidence: 99%