摘要
在 2 10～ 330 kg/ hm2 施氮量范围内 ,随施氮量提高 ,鲁麦 2 2籽粒直、支链淀粉积累量和积累速率上升 ,ATP含量及淀粉合成相关酶 SS(蔗糖合成酶 )、ADPGPPase(腺苷二磷酸葡萄糖焦磷酸化酶 )、U DPGPPase(尿苷二磷酸葡萄糖焦磷酸化酶 )、SSS(可溶性淀粉合成酶 )和 GBSS(淀粉粒束缚态淀粉合成酶 )活性均提高。与弱势粒相比 ,强势粒 ATP含量及淀粉合成相关酶活性高 ,因而淀粉积累量较高。相关分析表明 ,籽粒 SS、ADPGPPase、SSS和 GBSS是高产小麦籽粒淀粉合成的可能限制因子。
ATP content and activities of SS (sucrose synthase), ADPGPPase (Adenosine diphosphate glucose pyrophospherylase),UDPGPPase(Uridine diphosphate glucose pyrophospherylase), SSS (soluble starch synthase) and GBSS (granule bounded starch synthase) in winter wheat ( Triticum aestivum L. cv. Lumai 22) grains, key enzymes involving in starch synthesis improved with the nitrogen applying quantity increasing, within the nitrogen applying extention of 210～330 kg/ha. Therefore, both the accumulating quantity and rate of amylose and amylopectin in grains increased concomitantly. Compared with the inferior grains, the superior grains showed higher ATP content and activities of enzymes involving in grain starch synthesis, and subsequently got higher amylose and amylopectin accumulating quantity. SS, ADPGPPase, SSS and GBSS maybe the limiting factors for grain starch synthesis of high yielded wheat, according to the correlativity analysis.
出处
《作物学报》
CAS
CSCD
北大核心
2003年第3期462-467,共6页
Acta Agronomica Sinica
基金
国家自然科学基金资助项目 ( 3 9970 42 5 )
科技部生态农业技术体系研究与示范项目 ( 2 0 0 2 BA5 16A12 )
关键词
施氮水平
鲁麦22
籽粒
淀粉合成
小麦
限制酶
Wheat
Nitrogen applying quantity
Starch synthesis
Limiting enzymes
