中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

植酸形成与水稻籽粒充实的关系

王若仲1; 萧浪涛1; 丁君辉1; 严钦泉2   

  1. 1湖南农业大学 植物激素重点实验室， 湖南 长沙 410128; Email:wangruoz@163.com; 2湖南农业大学 水稻科学研究所， 湖南 长沙 410128）
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2003-01-10 发布日期:2003-01-10

Association of Phytate Formation with Grain Filling in Rice

WANG Ruo-zhong 1; XIAO Lang-tao 1; DING Jun-hui 1; YAN Qin-quan 2   

  1. （1Key Laboratory of Phytohormones; Hunan Agricultural University; Changsha 410128; China; E-mail:wangruoz@163.com; 2Rice Research Institute, Hunan Agricultural University, Changsha 410128; China）
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-01-10 Published:2003-01-10

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摘要： 研究了6个水稻品种（组合）的籽粒灌浆特征及植酸合成过程中相关生化成分变化与籽粒充实的关系。籽粒充实度好的亚杂1号(ISHR1)、亚杂2号（ISHR2）、R198和JW21，强、弱势粒灌浆不表现两段灌浆现象，而籽粒充实度差的亚杂3号（ISHR3）和559两段灌浆现象则十分明显。孕穗期至开花期，籽粒充实度好的品种其植酸、肌醇含量显著高于籽粒充实度差的品种；灌浆期，籽粒充实度差的品种无机磷含量明显高于籽粒充实度好的品种。相关分析表明，在孕穗期至开花期籽粒中植酸、肌醇含量与起始灌浆势（P0）、平均灌浆速率（RA）和籽粒充实率（GFP）均呈极显著正相关；灌浆期，无机磷含量与P0、RA和GFP呈极显著负相关，肌醇含量与P0、RA和GFP无明显相关性。提出了提高水稻籽粒充实度的有效途径。

关键词: 灌浆, 植酸, 肌醇, 无机磷

Abstract: The grain filling characteristics of six rice varieties (combinations) and the relationships between their relative biochemical composition during phytate formation and grain plumpness were studied. For rice varieties (combinations) ISHR1, ISHR2, R198 and JW21 with good grain plumpness, the two step filling in superior grains and inferior grains would not be clear. While for rice varieties (combinations) ISHR3 and 559 with poor grain plumpness, the two step filling in superior grains and inferior grains expressed very clearly. From booting stage to flowering stage, the contents of phytate and inositol in the varieties with good grain plumpness were obviously higher than those in the varieties with poor grain plumpness. While at grain filling stage, inorganic phosphorus content was obviously higher than that in the varieties with good grain plumpness. The contents of phytate and inositol from booting stage to flowering stage were very significantly correlated with the initial filling power (P0), average grain filling rate (RA) and inorganic grain filling percentage(GFP), and inorganic phosphorus content at grain-filling stage was significantly and negatively correlated with P0, RA and GFP. Furthermore, effective approaches to improve grain filling were put forward.

Key words: grain filling, phytate, inositol, inorganic phosphorus, rice