Opportunities for increased nitrogen-use efficiency from improved lowland rice germplasm

被引：141

作者：

Ladha, JK ^{[1
]}

Kirk, GJD ^{[1
]}

Bennett, J ^{[1
]}

Peng, S ^{[1
]}

Reddy, CK ^{[1
]}

Reddy, PM ^{[1
]}

Singh, U ^{[1
]}

机构：

[1] Int Rice Res Inst, Manila 1099, Philippines

来源：

FIELD CROPS RESEARCH | 1998年 / 56卷 / 1-2期

关键词：

nitrogen accumulation; nitrogen fixation; nitrogen concentration; nutrient-use efficiency; oxidative stress; photosynthesis; rice; roots; selection; senescence;

D O I：

10.1016/S0378-4290(97)00123-8

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Understanding of the mechanisms governing the efficient use of N by rice plants-both its acquisition and internal use-is reviewed. Acquisition efficiency is considered in terms of root properties influencing the absorption and assimilation of NH4+ and other N species, and their regulation; root-induced changes in the rhizosphere affecting N mineralization, transformation and transport; and root-associated biological N-2 fixation. Efficiency of internal use is considered in terms of the translocation, distribution and remobilization of absorbed N in different plant organs, flag leaf N import/export and leaf senescence patterns, and the efficiency with which N is used in CO2 fixation. Evidence for genetic variation in both acquisition efficiency and internal-use efficiency is given for plants under N-sufficient and N-limited conditions. The possibility of incorporating in rice the machinery for N-2 fixation is discussed. (C) 1998 Elsevier Science B.V.

引用

页码：41 / 71

页数：31

共 122 条

[1] FORMATION OF NODULAR STRUCTURES ON RICE SEEDLINGS BY RHIZOBIA [J].