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园艺学报 ›› 2007, Vol. 34 ›› Issue (1): 157-162.

• 观赏植物 • 上一篇    下一篇

干旱胁迫对转基因( PSAG12-ipt) 非洲菊光合作用的影响

赖齐贤1,2 ;包志毅1 ;朱祝军1*
; 毛碧增3 ; 钱琼秋1 ; 何 勇1
  

  1. (1 浙江大学园艺系, 杭州310029; 2 中国热带农业科学院热带作物品种资源研究所, 海南儋州571737; 3 浙江大学生物技术研究所, 杭州310029)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-02-25 发布日期:2007-02-25

Effects of Drought Stress on Photosynthesis of Gerbera Modified by PSAG12-ipt

LAI Qi-xian1,2 ; BAO Zhi-yi1 ; ZHU Zhu-jun1*
;MAO Bi-zeng3 ;QIAN Qiong-qiu1 ; HE Yong1
  

  1. (1 Departm ent of Horticulture, Zhejiang University, Hangzhou 310029, China; 2 Tropical Crops Germ plasm Resource Institute,Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan 571737, China; 3 Biotechnology Institute, Zhejiang University, Hangzhou 310029, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-02-25 Published:2007-02-25

摘要: 采用转基因( PSAG12
-ipt) 非洲菊为材料, 研究干旱胁迫对叶绿素荧光和光合作用的影响。结
果发现, 随着干旱胁迫加剧, PSⅡ电子传递量子效率(ΦPSⅡ) 、开放的PSⅡ反应中心捕获激发能效率
( Fv’/Fm’) 、光化学猝灭系数( qP) 、表观光合电子传递速率( ETR) 都表现出降低的趋势, 光化学反应
的能量( P) 在叶片所吸收的光能中所占的比例也逐渐减少, 净光合速率( Pn) 、气孔导度(Gs) 也出现
同样下降的趋势。随着干旱胁迫的解除, ΦPSⅡ、Fv’/Fm’、qP、ETR、Pn、Gs都显著上升, 缓慢恢复。
转基因植株与非转基因对照相比, 叶绿素荧光参数和光合作用参数的变化幅度较小, 在干旱胁迫下各项参
数下降较慢, 干旱胁迫结束后各项参数恢复较快。在干旱胁迫和恢复过程中, P在光能分配中所占的比例,
转基因植株大于对照。反应中心由非光化学反应耗散的能量( E) 在干旱胁迫过程和恢复过程中没有明显
的变化。

关键词: 非洲菊, 干旱胁迫, 光合作用, 叶绿素荧光

Abstract: The chlorophyll fluorescence parameters ( actual quantum yield of PSⅡ photochemistry, ΦPS
Ⅱ; quantum efficiency of open PSⅡ reaction centers, Fv’/Fm’; photochemical quenching coefficient, qP;
electron transport rate, ETR) and photosynthesis parameters ( net photosynthetic rate, Pn; stomatal conduct
ance, Gs) of the gerbera modified by PSAG12-ipt were investigated under drought stress. The results showed that
ΦPSⅡ, Fv’/Fm’, qP, ETR, Pn and Gs decreased after drought stress and gradually increased after wate
ring recovery. However, these decreases caused by drought stress were lower in the modified gerbera than in
the wild type. The modified gerbera showed a higher tolerance to drought stress. The fraction of absorbed light
in photochemistry ( P) decreased under drought stress, but being higher in the modified gerbera than in the
wild type. The fraction of thermal dissipation (D) was increased under drought stress. However, the fraction
of excess energy (E) was not changed during drought stress and recovery

Key words: Gerbera, Drought stress, Chlorophyll fluorescence, Photosynthesis