Journal Article

Tea (<i>Camellia sinensis</i>) clones with shorter periods of winter dormancy exhibit lower accumulation of reactive oxygen species

Dhiraj Vyas, Sanjay Kumar and Paramvir Singh Ahuja

in Tree Physiology

Volume 27, issue 9, pages 1253-1259
Published in print September 2007 | ISSN: 0829-318X
Published online September 2007 | e-ISSN: 1758-4469 | DOI: http://dx.doi.org/10.1093/treephys/27.9.1253
Tea (Camellia sinensis) clones with shorter periods of winter dormancy exhibit lower accumulation of reactive oxygen species

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Tea (Camellia sinensis (L.) O. Kuntze) is a perennial crop grown throughout the world. During winter, tea undergoes a dormancy period when growth of apical buds almost ceases, severely reducing the commercial yield of tea. Low temperatures prevail during the period of winter dormancy, which alone or in combination with high solar irradiance have the potential to induce oxidative stress in plants. We studied six tea clones under field conditions to test whether a relationship exists between oxidative stress and winter dormancy. Data on the behavior of the enzymatic antioxidative system was collected for all clones during different phases of winter dormancy. There was a strong positive correlation among clones between accumulation of reactive oxygen species (ROS) and the length of the dormancy period. Clones having shorter dormancy periods exhibited higher induction of antioxidative enzymes. Results suggest that efficient scavenging of ROS is a desirable feature in tea because it leads to lower accumulations of ROS during winter months and is associated with reduced winter dormancy.

Keywords: low temperature; oxidative stress; photosynthesis

Journal Article.  0 words. 

Subjects: Plant Sciences and Forestry

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