Chilling stress and chilling tolerance of sweet potato as sensed by chlorophyll fluorescence

被引：36
作者：
Lin, K. H. [1 ]
Hwang, W. C. [2 ]
Lo, H. F. [1 ]
机构：
[1] Chinese Culture Univ, Dept Hort & Biotechnol, Taipei, Taiwan
[2] Chinese Culture Univ, Grad Inst Biotechnol, Taipei, Taiwan
来源：
PHOTOSYNTHETICA | 2007年 / 45卷 / 04期
关键词：
cultivar differences; Ipomoea; photosystem; 2; quantum yield;
D O I：
10.1007/s11099-007-0108-z
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
We studied changes in the chlorophyll (Chl) fluorescence components in chilling-stressed sweet potato (Ipomoea batatas L. Lam) cv. Tainting 57 (TN57, chilling-tolerant) and cv. Tainting 66 (TN66, chilling-susceptible). Plants under 12-h photoperiod and 400 mu mol m(-2) s(-1) irradiance at 24/20 degrees C (day/night) were treated by a 5-d chilling period at 7/7 degrees C. Compared to TN66, TN57 exhibited a significantly greater basic Chl fluorescence (170), maximum fluorescence (F.), maximum fluorescence yield during actinic irradiation (F-m'), and the quantum efficiency of electron transport through photosystem 2, PS2 ((Phi(PS2)). Chilling stress resulted in decrease in the potential efficiency of PS2 (F-v/F-m), Phi(PS2), non-photochemical fluorescence quenching (NPQ), non-photochemical quenching (q(N)), and the occurrence of chilling injury in TN66. Chilling increased the likelihood of photoinhibition, characterized by a decline in the Chl fluorescence of both cultivars, and photoinhibition during low temperature stress generally occurred more rapidly in TN66.
引用
收藏
页码：628 / 632
页数：5
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