The Responses of Morphological Trait, Leaf Ultrastructure, Photosynthetic and Biochemical Performance of Tomato to Differential Light Availabilities

Agricultural Sciences in China Pub Date : 2011-12-01 DOI:10.1016/S1671-2927(11)60189-2

Qiu-shi FU , Bing ZHAO , Xue-wen WANG , Yu-jue WANG , Shu-xin REN , Yang-dong GUO

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引用次数: 7

Abstract

The whole-plant morphology, leaf ultrastructure, photosynthesis as well as enzyme activities of two tomato cultivars (Meifen-2 and Hongsheng) to differential light availabilities (450-500 μmol m⁻² s⁻¹, 75-100 μmol m⁻² s⁻¹) were examined in controlled environment. The results showed that the plant biomass and root/shoot ratio decreased and the specific leaf area increased significantly under the low light condition. There was a significant increase in malondialdehyde (MDA) concentration, superoxide dismutase (SOD) and peroxidase (POD) activities and decrease in soluble sugar and protein contents in LL-grown plants. For both cultivars, downregulation of photosynthesis and electron transport components were observed in LL-grown plants, the inhibition of the photosynthesis under the LL condition could be partially explained by the decrease of stomata density and by the changes of chloroplast.

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番茄形态性状、叶片超微结构、光合及生化性能对不同光效的响应

摘要在不同光效(450 ~ 500 μmol m−2 s−1)和不同光效(75 ~ 100 μmol m−2 s−1)条件下，测定了两种番茄品种(梅粉2号和红胜2号)的全株形态、叶片超微结构、光合作用和酶活性。结果表明:弱光条件下，植物生物量和根冠比显著降低，比叶面积显著增加;低剂量栽培植株丙二醛(MDA)浓度、超氧化物歧化酶(SOD)和过氧化物酶(POD)活性显著升高，可溶性糖和蛋白质含量显著降低。两个品种的光合作用和电子传递组分均出现了下调，气孔密度的降低和叶绿体的变化可以部分解释LL条件下光合作用受到抑制的原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Agricultural Sciences in China AGRICULTURE, MULTIDISCIPLINARY-

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审稿时长

3.2 months