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Light Heterogeneity of Individual Leaf Cause by Cupping Influences Photosynthetic Characteristics in Pima Cotton
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  • Yujie Zhang,
  • Jimei Han,
  • Zhangying Lei,
  • Haofeng Meng,
  • Wang-Feng Zhang,
  • Yali Zhang
Yujie Zhang
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Jimei Han
The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University
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Zhangying Lei
The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University
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Haofeng Meng
The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University
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Wang-Feng Zhang
The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University
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Yali Zhang
The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University
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Abstract

Light heterogeneity can lead to the heterogeneity of morphological structure and physiological functions in different leaves. However, little attention has been paid to the effect of nonuniform illumination on morphological structure and photosynthetic performance between the two symmetrical portions along the main vein within individual leaves. This experiment was carried out by the method of combining site determination in the field and shading simulation in the phytotron using pima cotton which have cupping leaves. In the field, maximum net photosynthetic rate, leaf area, and leaf mass per area were positively correlated with daily photo irradiance (DPI), while the chlorophyll content related negatively with DPI. These results indicated that the heterogeneity of photosynthetic characteristics between two sides of along the main vein within individual leaves were related with its intercepted light energy. Further, the shading simulation experiments also verified this conclusion. Interestingly, compared to the both ambient leaves and individual shading leaves, the photosynthetic characteristics of both ambient leaves and shading leaves in shading half leaves were changed. Thus, we also discussed that the development of the photosynthetic characteristics in one side of the main vein in a leaf was systematically regulated by adjacent side.

Peer review status:UNDER REVIEW

12 Feb 2020Submitted to Plant, Cell & Environment
14 Feb 2020Assigned to Editor
14 Feb 2020Submission Checks Completed
20 Feb 2020Reviewer(s) Assigned
24 Mar 2020Review(s) Completed, Editorial Evaluation Pending