Effects of Different Photosynthetic Organs on the Yield and Protein Content of Superior and Inferior Wheat Kernels

doi:10.7668/hbnxb.20190139

Abstract

Abstract: In order to understand the effects of different photosynthetic organs on grain characteristics and the effects of panicle location on yield and quality of wheat, field experiments were conducted in Jinan of Shandong Province with two wheat varieties Jimai 22 (Medium gluten) and Jimai 229 (Strong gluten) during 2011-2012. The effects of leaves and non-leaf photosynthetic organs on kernel number per spike (KNS), thousand-kernel weight (TKW), and protein content (PC) in superior (SK) and inferior kernels (IK) under six treatments of darken spikes or cutting off leaves were investigated. Results showed that single treatment had less effect on KNS for both SK and IK, but more on TKW and PC. However, darken spikes and cutting off all leaves at the same time significantly decreased KNS and TKW and increased PC for SK and IK of two varieties. Under single treatment, cutting off flag leaves presented the largest effects on TKW and PC, followed by darken spikes. Jimai 22 had higher KNS for SK and higher TKW for SK and IK, whereas Jimai 229 had higher PC, consistent with the characteristics of two varieties. Under different treatments, the changes of KNS and TKW for SK and IK of two varieties were almost consistent with each other, while the changes of PC were opposite with KNS and TKW. Therefore, to improve the photosynthetic efficiency of leaves and to enhance the photosynthetic capacity of non-leaf organs such as spikes are of great value in grain filling and breeding high and stable yielding varieties.

Key words: Superior kernel, Inferior kernel, Photosynthesis, Thousand-kernel weight, High-yielding

CLC Number:

S512.01

CHENG Dungong, WANG Canguo, GUO Jun, CAO Xinyou, LIU Cheng, LI Haosheng, LIU Aifeng, SONG Jianmin, LIU Jianjun. Effects of Different Photosynthetic Organs on the Yield and Protein Content of Superior and Inferior Wheat Kernels[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(S1): 43-48. doi: 10.7668/hbnxb.20190139.

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