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The Comparison of Chloroplasts Function Characteristics During Leaf Senescence in Two Ginkgo Varieties(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2009年03期
Page:
99-103
Research Field:
生命科学
Publishing date:

Info

Title:
The Comparison of Chloroplasts Function Characteristics During Leaf Senescence in Two Ginkgo Varieties
Author(s):
Han Biao; Chen Guoxiang; Gao Zhiping; Wei Xiaodong; Xie Kaibin; Yang Xiansong; Tang Jiahong; Liu Dan
School of Life Sciences,Nanjing Normal University,Nanjing 210046,China
Keywords:
Ginkgo;  Ch lo roplast;  light-energy conversion character istics;  ch lorophy ll fluorescence
PACS:
S792.95
DOI:
-
Abstract:
The change of chloroplasts function character istics and thy lako id m em brane polypeptide component dur ing leaf senescence in na ture condition of tw o im po rtan t spec ies o fG inkgo—— Da fozhi“ and ” Q ix ingguo“we re stud ied. The resu lts show ed that: the leaf ch lo rophy ll content, ATPase activity, Fv /Fm andF v /F0 o f Dafozh i increased in August. A fter they got them ax lm um number at the end o fAugust, they descented quack ly. H owever, the content o fATP descented w ith the activ ity of photophory lation from the beg inn ing o fAugust. The light-energy conversion charac teristice o fQ ix ingguo descented slow ly from the beg inning o fAugust, but it was not so qu ick ly as dafozh.i Thy lako id m em brane po lypeptide component of Da fo zh i degraded m ore quick ly than Q ix ingguo‘ s, bu t there is no d ifference at seeds ou tput between th is tw o G inkgo var ieties. From the resu ltw e know that the leaf senescence o fQ ix ingguo is ear lier than Da fozh,i bu t Dafozhis’ leaf senescence is faster than Q ix ingguo’s; Ch lo roplast light-energy conversion index declined earlier than pho tosynthetic apparatus and som e enzym es

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Last Update: 2013-04-23