The time courses of different indexes, including luminous intensity in the canopy, leaf temperature, photosynthetic parameters, quality component contents and the expression of genes related to quality component biosynthesis on August 19th and September 23th were measured in Longjing 43 (Camellia sinensis cv. Longjing 43). Using the results above, the effects of luminous intensity and leaf temperature on the tea photosynthesis and the influence of luminous intensity, leaf temperature and net photosynthesis rate on the accumulation of quality components and the transcription levels of biosynthetic genes could be confirmed preliminary. The results suggested that leaf temperature and photosynthetic activity of mesophyll cells were important physiological factors to affect the net photosynthesis rate of autumn tea. Moreover, the leaf temperature might influence the biosynthesis and accumulation of catechins and amino acids in autumn tea by regulating the expression of catechins biosynthetic genes, such as CsPAL, CsF3′5′H, CsANS, CsUFGT and amino acid biosynthetic genes, including CsGS, CsGOGAT and CsTS1. Otherwise, the luminous intensity and the net photosynthesis rate of autumn tea were significantly correlated with the expression levels of genes related to catechin, amino acid and caffeine biosynthesis.
ZHANG Lan
,
WEI Jipeng
,
SHEN Chen
,
YAN Peng
,
ZHANG Liping
,
LI Xin
,
HAN Wenyan
. Analysis of the Photosynthesis and Quality Components Changes in Autumn Tea[J]. Journal of Tea Science, 2018
, 38(3)
: 271
-280
.
DOI: 10.13305/j.cnki.jts.2018.03.007
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