Photosynthesis, sucrose metabolism, and starch accumulation in two NILs of winter wheat

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• 作者：Baoshan Wang ; Mingyang Ma ; Haiguo Lu ; Qingwei Meng ; Gang Li…
• 关键词：Photosynthetic rate ; Wheat ; Sucrose metabolism ; Starch accumulation ; Near isogenic lines
• 刊名：Photosynthesis Research
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：126
• 期：2-3
• 页码：363-373
• 全文大小：522 KB
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• 作者单位：Baoshan Wang (1)
  Mingyang Ma (1)
  Haiguo Lu (1)
  Qingwei Meng (1)
  Gang Li (1)
  Xinghong Yang (1)
  
  1. State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, 271018, People’s Republic of China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Physiology
  
• 出版者：Springer Netherlands
• ISSN：1573-5079

文摘

The photosynthetic oxygen evolution rate, Hill reaction activity of seedlings and photosynthetic parameter, Pn–Ci curve and some source-sink metabolism-related enzyme activities, and substance content of flag leaves were measured by using two wheat near isogenic lines with significant differences in the photosynthetic rate of the 154 (high photosynthetic rate) and 212 (low photosynthetic rate) lines as materials. The results showed that the maximal carboxylation efficiency (Vcmax) and Hill reaction activity were higher in line 154 than that of line 212. The Pn in flag leaves of line 154 was significantly higher than that of line 212 during the anthesis to grain-filling stage. Higher leaf sucrose phosphate synthase activity, grain sucrose synthase activity, and grain ADPG pyrophosphorylase activity ensured that the photosynthate of line 154 could be transported to grains and translated into starch in a timely and effective manner, which also contributed to the maintenance of its high photosynthetic rate. Eventually, all of these factors of line 154 resulted in its higher grain yield compared with the low photosynthetic rate of line 212. Keywords Photosynthetic rate Wheat Sucrose metabolism Starch accumulation Near isogenic lines