Differential response of photosynthesis in greenhouse- and field-ecotypes of tomato to long-term chilling under low light
Differential response of photosynthesis in greenhouse- and field-ecotypes of tomato to long-term chilling under low light
复制标题
温室和田间生态型番茄光合作用对弱光长期低温的差异响应
DOI：
10.1016/j.jplph.2005.10.006
复制
发表时间：
2006-12-01
影响因子：
4.3
通讯作者：
Yu, Jing Quan
中科院分区：
文献类型：
--
作者：
Hu, Wen Hai;Zhou, Yan Hong;Yu, Jing Quan
比较了国产番茄（Lycopersicon esculentum） 3个温室生态型品种和4个大田生态型品种光合器官对低温的敏感性。在12/7℃下100 μ mol m(-2) s（-1）的光照下冷却10天后，在25/18℃和600 μ mol m(-2) s（-1）的光照下恢复10天。对于预冷和恢复植株，温室生态型品种并不一定比田间生态型品种表现出更高的净CO2同化率(A)、PSII点电子传递量子产率（Phi(PSII)）和光化学猝灭（q(p)）。在降温后，温室生态型品种的A、Phi（PSII）值高于田间生态型品种。发现Phi（PSII）的差异主要是由于q(p)。预冷植株的生态型差异不存在，表明该性状不是组成性表达，而主要依赖于适应/驯化机制。与田间生态型品种相比，温室生态型品种能更快地适应低温弱光，并表现出更高的A、Phi（PSII）、q(p)值和更强的降温后再生能力。低温胁迫下植物的Phi（PSII）和q(p)与低温胁迫下植物的再生长力高度相关，表明低温胁迫下的Phi（PSII）和q(p)可作为育种项目中抗寒性的筛选指标。(c) 2005 Elsevier GmbH版权所有。
Three greenhouse- and four field-ecotype varieties of domestic tomato (Lycopersicon esculentum) were compared for the sensitivity of their photosynthetic apparatus to chilling under tow light intensity. After chilling at 12/7 degrees C under 100 mu mol m(-2) s(-1) of light for 10 days, they were allowed to recover at 25/18 degrees C and 600 mu mol m(-2) s(-1) of tight for 10 days. For both pre-chilling and recovered plants, greenhouse-ecotype varieties did not necessarily show higher net CO2 assimilation rate (A), quantum yield of electron transport at PSII (Phi(PSII)) and photochemical quenching (q(p)) than field-ecotype varieties. However for the post-chilling period, greenhouse-ecotype varieties, exhibited higher A, and Phi(PSII) values than field-ecotype varieties. The difference in Phi(PSII) was found to be largely due to q(p). The absence of ecotypic differences in pre-chilling plants indicates that the trait was not expressed constitutively, but relied mainly on adaptation/acclimation mechanisms. Green-house-ecotype varieties were able to adapt to tow temperature and low light more quickly, and then exhibited higher A, Phi(PSII), q(p) values and greater re-growth capacity after chilling than field-ecotype varieties. Plant re-growth capacity after chilling was highly correlated with Phi(PSIIO) and q(p) measured in chilled plants, suggesting the usefulness of Phi(PSII) and q(p) measured at low temperature after defined chilling stresses as screening indexes for chilling tolerance in breeding programs. (c) 2005 Elsevier GmbH. All rights reserved.