摘要
试验以５个八倍体小偃麦、野生二粒小麦、硬粒小麦和１３个普通小麦品种（系）为材料，研究了叶片中硝酸还原酶活性（ＮＲＡ）、氨基酸和粗蛋白含量与籽粒蛋白质含量之间的关系。结果表明，叶片中ＮＲＡ在拔节、抽穗、开花三个生育时期与籽粒蛋白质含量存在显著的正相关系；叶片中氨基酸总量与籽粒蛋白质含量在拔节和抽穗期显著相关，在开花期相关不显著；抽穗期旗叶中粗蛋白含量与籽粒蛋白质含量相关显著。籽粒蛋白质含量高的基因型材料其叶片中ＮＲＡ、氨基酸和粗蛋白含量一般高于低蛋白基因型材料，三者的变化趋势一致，这反映了不同基因型Ｎ素代谢的特点。因此适宜生育时期叶片中ＮＲＡ、氨基酸和粗蛋白含量可作为品质育种选择过程中的参考生理指标。
Five 8×Trititrigia,one T.dicoccoides Korn ,one T.dicoccum and thirteen T.aestivum L. va-rieties or strains were studied in order to establish the relationship between their grain proteincontent and leaf blade NR activity,free amino acid and crude protein content. The results showedthat the grain protein content was significantly correlated with leaf blade NR activity in jointing,heading and blooming stages,and correlated with total amino acid content of leaf blade in joiningand heading stages and with the crude protein content of flag blade in heading stage. The NR ac-tivity,amino acid and crude protein content in leaf blade were generally higher in genotypes withhigh grain protein content than in those with low grain protein content.This might bethe reflec-tion of the metabolic characteristics of nitrogen for different genotypes.Thus,the NR activity,amino acid and crude protein content could be used as the referential physiological criterioas in theappropriate developmental stages in seed quality selection programme.
出处
《西北植物学报》
CAS
CSCD
北大核心
1995年第4期282-287,共6页
Acta Botanica Boreali-Occidentalia Sinica
