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Position: Home > Articles > Accumulation characteristic of protein bodies in different regions of wheat endosperm under drought stress Journal of Integrative Agriculture 2016,15 (12)

Accumulation characteristic of protein bodies in different regions of wheat endosperm under drought stress

作者：

Chen Xin-yu;Li Bo;Shao Shan-shan;Wang Lei-lei;Zhu Xiao-wei;Yang Yang;Wang Wen-jun;Yu Xu-run;Xiong Fei

单位：

Jiangsu Yanjiang Inst Agr Sci, Nantong 226541, Peoples R China;Yangzhou Univ, Jiangsu Key Lab Crop Genet & Physiol, Coinnovat Ctr Modern Prod Technol Grain Crops, Yangzhou 225009, Jiangsu, Peoples R China

关键词：

wheat;protein bodies;distribution;accumulation;drought stress

摘要：

The structural characteristics of protein body accumulation in different endosperm regions of hard wheat cultivar (XM33) and soft wheat cultivar (NM13) under drought stress were investigated. Drought stress treatment was implemented from plant regreening to the caryopsis mature stage. Microscope images of endosperm cells were obtained using resin semi thin slice technology to observe the distribution and relative area of protein body (PB). Compared with NM13, relative PB area of XM33 was significantly higher in sub-aleurone endosperm region. The amount of accumulation, including the size and relative area of PB, in two wheat cultivars was higher in sub-aleurone region than that in central region at 18 days post anthesis (DPA). Drought stress significantly enhanced the sizes and relative areas of PBs in the dorsal and abdominal endosperms in two wheat cultivars. Particularly for dorsal endosperm, drought stress enhanced the relative PB area at 18 DPA and NM13 (5.0% vs. 6.73%) showed less enhancement than XM33 (5.49% vs. 8.96%). However, NM13 (9.58% vs. 12.02%) showed greater enhancement than XM33 (10.25% vs. 11.7%) at 28 DPA. The protein content in the dorsal and abdominal endospernns of the two wheat cultivars decreased at 12 DPA and then increased until 38 DPA. Drought stress significantly increased the protein contents in the two main regions. From 12 to 38 DPA, the amount of PB accumulation and the protein content were higher in XM33 than those in NM13. The results revealed that PB distribution varied in different endosperm tissues and that the amount of PB accumulation was remarkably augmented by drought stress.

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Accumulation characteristic of protein bodies in different regions of wheat endosperm under drought stress

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