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浙江大学学报（农业与生命科学版）
浙江大学学报(农业与生命科学版)  2011, Vol. 37 Issue (5): 501-508    DOI: 10.3785/j.issn.1008-9209.2011.05.005
生物科学与技术     
鸡冠花品种间耐热性差异的光合生理机制
张开明, 李永华, 孔德政, 何松林
河南农业大学林学院,河南郑州４５０００２
Photo‐physiological mechanisms of tolerant difference to high temperature between two varieties of Celosia cristata
ZHANG Kai‐ming , LI Yong‐hua , KONG De‐zheng , HE Song‐lin
College of Forestry , Henan A gricultural University , Zhengzhou 450002 , China
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摘要： 为了研究鸡冠花品种间耐热性差异的光合生理机制,选用耐热品种?世纪绿叶"和热敏品种?世纪铜叶"进行高温胁迫处理,从气体交换参数、叶绿体各成分含量、叶片对光能的吸收利用及能量分配等方面进行分析.结果表明:高温下生长的?世纪绿叶"叶绿素a 含量较高,增加了用于光化学的能量,同时非光化学猝灭(NPQ)中状态转换猝灭(qT)的成分较多,能够帮助及时耗散过剩光能,因此没有发生光抑制现象,其净光合速率(Pn)也较高;?世纪铜叶"具有较强的耐受高光强能力,但在高温下,其光合作用因非气孔因素导致下降而发生光抑制,这与高温导致其对光能的利用减少,产生了过多的激发能有关,同时,?世纪铜叶"叶绿素a 含量较少,能态猝灭(qE)和qT 含量较小而光抑制和光损伤猝灭(qI)比例较大,不能及时耗散过剩光能,因此对高温敏感.
Abstract: Photo‐physiological mechanisms of tolerant difference to high temperature between two varieties of Celosia cristata , 'Century green' and 'Century copper 'were investigated . The parameters of gas exchange , chlorophyll content , light energy utilization and distribution were measured . The results showed that , 'Century green'had higher chlorophyll a (chla) content , which made more energy distribute to quantum yield of photosystem Ⅱ ( ΦPS Ⅱ ) . Meanwhile , higher non‐photochemical
luorescence quenching associated with state transitions ( qT ) in 'Century green'helped to dissipate excessive light energy timely . 'Century copper'had a higher tolerance to high light , but photoinhibition happened under high temperature for non‐stomatal factors , which reduced light energy utilization .Meanwhile , 'Century copper'can not dissipate excessive light energy because of lower chla content and lower proportion of qT . As a result , 'Century copper'was more sensitive to high temperature than 'Century green'.
出版日期: 2011-09-20
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张开明
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引用本文:

张开明, 李永华, 孔德政, 何松林. 鸡冠花品种间耐热性差异的光合生理机制[J]. 浙江大学学报(农业与生命科学版), 2011, 37(5): 501-508.

ZHANG Kai‐ming,LI Yong‐hua,KONG De‐zheng,HE Song‐lin. Photo‐physiological mechanisms of tolerant difference to high temperature between two varieties of Celosia cristata. Journal of Zhejiang University: Agric. & Life Sci., 2011, 37(5): 501-508.

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http://www.zjujournals.com/agr/CN/10.3785/j.issn.1008-9209.2011.05.005    或    http://www.zjujournals.com/agr/CN/Y2011/V37/I5/501

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