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题名 干旱胁迫下山黧豆毒素β-ODAP积累及异速生长关系研究
姓名 熊俊兰
院系 生命科学学院
专业 生态学
学位名称 理学博士
外文题名 Toxin β-ODAP accumulation and allometric relationship in grass pea (Lathyrus sativus L.) under drought stress
第一导师姓名 熊友才
关键词 山黧豆(Lathyrus sativus L.);β-N-草酰-L-α,β-二氨基丙氨酸;干旱胁迫;24-表油菜素内酯;生物量积累;异速生长;繁殖输出
外文关键词 grass pea (Lathyrus sativus L.);β-N-oxalyl-L-α, β-diaminopropionic acid;drought stress;24-epibrassinolide;biomass accumulation;allometric scaling;reproductive output
学科 理学
摘要 本研究以山黧豆(Lathyrus sativas L.)为试验材料,生长环境控制与大田试验相结合,通过设置不同水分梯度,测定不同生长期不同器官毒素β-N-草酰-L-α,β-二氨基丙氨酸(β-N-oxalyl-L-α, β-diaminopropionic acid, β-ODAP)生物合成与分布、个体生长、水分利用和产量形成等指标,得出如下结果: 一)全生育期单个品种的盆栽控水和激素添加试验 从苗期到结荚期,叶片β-ODAP浓度逐渐降低,β-ODAP含量先增后降;从花期到成熟期,荚中β-ODAP浓度和含量呈现先增后降的趋势。干旱胁迫显著增加了叶片、荚和成熟期籽粒β-ODAP浓度,显著降低其β-ODAP含量。干旱胁迫显著改变了山黧豆生物量积累和分配的异速生长关系,但是外源施加EBL和ABA对该关系无显著影响。 二)繁殖生长期七个品种盆栽控水试验 从花期到结荚期,叶片β-ODAP浓度和含量均显著降低, 从结荚期到成熟期,荚中β-ODAP浓度和含量均降低。除了IF1310外,干旱胁迫显著增加了不同基因型山黧豆叶片和荚或籽粒β-ODAP浓度,降低了β-ODAP含量。成熟期籽粒β-ODAP浓度和含量均与结荚期叶片和荚β-ODAP含量之和呈显著性正相关。 三)成熟期五十五个品种在两个不同降雨量年份大田试验 降雨量显著影响山黧豆产量形成、收获指数和籽粒β-ODAP浓度和含量。不同基因型山黧豆产量和β-ODAP表现方面存在较大的变异。
外文摘要 Various water supply regimes were designed in pot and field experiments to determine the parameters of toxin β-N-oxalyl-L-α, β-diaminopropionic acid (β-ODAP) biosynthesis and distribution in different organs, individual growth, water use, and yield formation in grass pea (Lathyrus sativus L.). Interdisciplinary researches and validating experiments were systematically conducted at the physiological level, individual level and population level. The major results were presented as follows. 1. Pot-culture trials with varies water supplies and exogenous hormone application using one genotype throughout the whole growth period Leaf β-ODAP concentration gradually decreased and β-ODAP amount firstly increased and then decreased from the seedling to podding stage, pod β-ODAP concentration and amount increased from flowering to podding stage, and then decreased from podding stage to maturity. Drought stress significantly increased the β-ODAP concentration and decreased β-ODAP amount in leaves, pods, and mature seeds. Drought stress significantly changed the allometric relationships between organ biomass or allocation and total biomass, although exogenous EBL and ABA did not significantly affect it. 2. Pot-culture trais with various water treatments using seven grass pea genotypes during the reproductive growth period. The β-ODAP concentration and amount in leaves decreased from flowering to podding stage, β-ODAP concentration and amount in pods also decreased from podding stage to maturity. Water shortage significantly increased the β-ODAP concentration and decreased the β-ODAP amount in leaves, pods, and seeds in all genotypes, expect IF 1310. There were significant positive relationships between the seed β-ODAP concentration or amount at maturity and the sum of leaf and pod β-ODAP amount at the podding stage. 3. Field trails using fifty-five grass pea genotypes with different toxin levels over two growing seasons with different rainfall amount at maturity The rainfall significantly affected the grain yield, harvest index, grain β-ODAP concentration and amount. Large differences existed among different grass pea genotypes for biomass and β-ODAP traits.
研究领域 农业生态学/植物生态学
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