Seasonal clonal variations and effects of stresses on quality chemicals and prephenate dehydratase enzyme activity in tea (Camellia sinensis)
IR@IHBT: CSIR-Institute of Himalayan Bioresource Technology, Palampur
View Archive Info| Field | Value | |
| Title |
Seasonal clonal variations and effects of stresses on quality
chemicals and prephenate dehydratase enzyme activity in tea
(Camellia sinensis)
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| Creator |
Sharma, V
Joshi, Robin Gulati, Ashu |
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| Subject |
Plant sciences
Nutraceuticals Natural Product Chemistry |
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| Description |
Seasonal and clonal variations in catechins,
flavour component 2-phenylethanol and prephenate dehydratase
(PDT) enzyme were studied in tea clones representing
both Assam and China varieties growing in Kangra
region of India. Catechins were analysed and quantified by
HPLC, and 2-Phenylethanol was quantified by GC. Assam
variety recorded higher amounts of catechins and PDT
activity than China variety in all the three growth flushes.
Activity of PDT and catechins content was high during
mains growth flush followed by early and backend flush. 2-
Phenylethanol content recorded higher levels in China
variety compared to Assam variety, and higher content was
observed in the early flush and decreased thereafter with
progress in season in both the varieties. Decrease in catechins
content, 2-phenylethanol and PDT activity was
observed in the tea shoots infested by Exobasidium vexans
over healthy shoots. Drought stress induced by withholding
water for a period of 8 days caused initial increase in the
contents of the catechins, 2-phenyethanol and PDT activity
and decreased with 3 day onwards with an increase in the
severity of water stress. Seasonal variations showed modulations
in catechins and 2-phenylethanol in response
to changing environmental conditions, suggesting that
depending on the season there is higher flux of substrate
towards the required product.
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| Date |
2011
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://ihbt.csircentral.net/621/1/567_2011_9%2D12%2D2011.pdf
Sharma, V and Joshi, Robin and Gulati, Ashu (2011) Seasonal clonal variations and effects of stresses on quality chemicals and prephenate dehydratase enzyme activity in tea (Camellia sinensis). European Food Research and Technology, 232. pp. 307-317. |
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| Relation |
http://ihbt.csircentral.net/621/
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