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Journal of Integrative Agriculture  2022, Vol. 21 Issue (4): 995-1003    DOI: 10.1016/S2095-3119(20)63565-1
Special Issue: 棉花合辑Cotton
Crop Science Advanced Online Publication | Current Issue | Archive | Adv Search |
Systematical regulation involved in heterogeneous photosynthetic characteristics of individual leaf in pima cotton
ZHANG Yu-jie, HAN Ji-mei, LEI Zhang-ying, MENG Hao-feng, ZHANG Wang-feng, ZHANG Ya-li
Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Corps/College of Agronomy, Shihezi University, Shihezi 832003, P.R.China
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Abstract  Light heterogeneity leads to anatomically and physiologically heterogeneous features in leaves.  However, little attention has been paid to the effects of nonuniform illumination on the anatomical and photosynthetic performance on both sides along the leaf main vein.  This study explored such effects by combining in situ determination in the field with shading simulation in the phytotron, on pima cotton that has cupping leaves.  Photosynthetic characteristics and morphological structures were measured in the field on both sides along the main vein of eastward, westward, southward, and northward leaves.  The results showed that the difference in photosynthetic capacity between the two sides along the main vein in different directions was closely related to the daily photo irridiance (DPI).  This result indicates that the photosynthetic heterogeneity between the two sides is related to their intercepted light energy.  The conclusion was further verified by the shading simulation experiments.  Photosynthetic capacity and leaf thickness of the unshaded sides of leaves in the half-shaded treatment decreased, compared to those in the unshaded treatment.  Therefore, it is conjectured that the development of  photosynthetic characteristics on one side is systematically regulated by that on the other side.  The study provides theoretical guidance on accessing the feasibility of sampling and directional planting.   

Keywords:  photosynthetic heterogeneity       morphological traits        leaf mass per area        shade        systemic regulation  
Received: 02 June 2020   Accepted: 30 November 2020
Fund: This research was supported by the National Natural Science Foundation of China (31860355; U1903302) and the Regional Innovation Guidance Plan of Xinjiang Production and Construction Corps, China (2021BB001). 
About author:  Correspondence ZHANG Ya-li, Tel: +86-993-2058005, E-mail:

Cite this article: 

ZHANG Yu-jie, HAN Ji-mei, LEI Zhang-ying, MENG Hao-feng, ZHANG Wang-feng, ZHANG Ya-li. 2022. Systematical regulation involved in heterogeneous photosynthetic characteristics of individual leaf in pima cotton. Journal of Integrative Agriculture, 21(4): 995-1003.

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