摘要
以温室盆栽的皖麦 38(高蛋白 )、扬麦 9号 (低蛋白 )两个冬小麦 (TriticumaestivumL )品种为材料 ,在花后土壤干旱 (土壤相对含水量 =4 5 %～ 5 0 % )和渍水状况下 ,分别施用 6 BA(0 0 5mmol/L)和NaHSO3 (2mmol/L) ,分析了两种生长调节物质对小麦光合特性、不同器官中物质运转和籽粒蛋白质及淀粉品质的影响。结果表明 :两种生长调节物质均减轻了花后水分逆境引起的小麦旗叶净光合速率和叶绿素含量的快速下降 ,以及花后同化物和同化氮素输入籽粒量的显著下降 ,提高了花后同化物对籽粒重以及花后同化氮素对籽粒总氮的贡献率 ,促进了水分逆境下小麦籽粒蛋白质和淀粉的积累。其中NaHSO3 和 6 BA分别在干旱和渍水条件下的作用较为显著 ,可考虑作为水分逆境状况下改善籽粒蛋白质和淀粉合成的生长调节物质。
Two winter wheat (Triticum aestivum L.) cultivars differing in grain protein content, Wanmai38 and Yangmai9, were cultured under drought (soil relative water content, SRWC= 45%-50%) and waterlogging after anthesis in pot experiment to investigate the effects of two growth regulation substances i.e. 6-BA (0.05 mmol/L) and NaHSO 3 (2 mmol/L) on leaf photosynthesis, assimilate transportation in different organs and accumulation of grain protein and starch. It was found that the rapid decline trends in net photosynthesis and chlorophyll contents of flag leaves and in amount of post-anthesis assimilated dry matter and nitrogen transferring into grain were amended by all growth regulator substances. The contributions of post-anthesis assimilate and nitrogen to grain weight and grain nitrogen were elevated, respectively, which promoted accumulation of grain protein and starch in wheat grain under water adversities. Between the two growth regulation substances, the effects of NaHSO 3 and 6-BA were significant under drought and waterlogging, respectively, and thus could be served as substances to improve synthesis of grain protein and starch under water adversities.
出处
《作物学报》
CAS
CSCD
北大核心
2004年第10期1047-1052,共6页
Acta Agronomica Sinica
基金
国家自然科学基金 ( 3 0 170 5 44 )
高校博士点基金 ( 2 0 0 0 0 3 0 70 7)
江苏省自然科学基金 (BK2 0 0 10 63
BK2 0 0 2 0 2 5 )资助项目
关键词
小麦
干旱
渍水
生长调节物质
光合特性
物质运转
Winter wheat (Triticum aestivum L.)
Drought
Waterlogging
Growth regulation substances
Photosynthetic characteristics
Assimilates transportation
