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Relationships of non‐structural carbohydrates accumulation and translocation with yield formation in rice recombinant inbred lines under two nitrogen levels
Author(s) -
Pan Junfeng,
Cui Kehui,
Wei Dong,
Huang Jianliang,
Xiang Jing,
Nie Lixiao
Publication year - 2011
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.2010.01441.x
Subject(s) - chromosomal translocation , nitrogen , yield (engineering) , oryza sativa , grain yield , recombinant dna , chemistry , biology , zoology , horticulture , materials science , biochemistry , gene , organic chemistry , metallurgy
Stem non‐structural carbohydrates (NSCs) and its relationship with yield formation was investigated under low nitrogen (LN) and normal nitrogen (NN) treatments, using 46 recombinant inbred lines from Zhenshan 97 × Minghui 63 ( Oryza sativa ). Apparent contribution of transferred NSC to grain yield (AC NSC ) ranged from approximately 1 to 28% under LN and from 1 to 15% under NN. Concentration and total mass of NSC in stem (TM NSC ) at heading, apparent transferred mass of NSC (ATM NSC ) and AC NSC were larger under LN compared with NN. However, there was no significant difference in the apparent ratio of transferred NSC from stems to grain (AR NSC ). ATM NSC was positively correlated with grain yield, 1000‐grain weight and AC NSC under both nitrogen levels, whereas AR NSC was highly correlated with harvest index and AC NSC . Leaf area contributed more strongly to grain yield compared with ATM NSC under both LN and NN. ATM NSC showed larger direct effects on grain yield under LN compared with NN. TM NSC at heading, small vascular bundles (SVBs) and spikelets per m 2 under LN had positive direct effects on ATM NSC . SVB and spikelets per m 2 under LN had larger and positive direct effects, and large vascular bundles had negative direct effects on AR NSC . TM NSC at heading and SVB under LN had positive direct effects on AC NSC . In brief, LN supply increased stem NSC accumulation and translocation to developing grain. Components of the source‐sink‐flow system showed different effects on NSC translocation and contribution to yield formation, depending on genotype and nitrogen level.