扬州大学学报（农业与生命科学版）2016，Vol.37Issue(4)：77-83,7.DOI:10.16872/j.cnki.1671-4652.2016.04.015
盐分胁迫及外源GA3调节对甜高粱幼苗生长的影响
Effects of salinity and external GA3 regulation on growth of sweet sorghum seedlings
摘要
Abstract
Seedling growth could be affected under salt stress conditions.Reasonable amendment of exogenous hormones could be an effective way to reduce the negative effects of salt stress.The study was done to investigate the effects of salinity level (NaCl 0,0.3,and 0.6 g· kg-1 dry base) and GA3 amendment (GA3 0,45,90,and 180 bμg· kg-1 dry base) on growth and physiological characteristics of sweet sorghum [Sorghum bicolor (L.Moench)] seedlings of Chuntian 2.With the increase of salinity level in the media,emergence percentage,plant height,leaf length and width,root length,plant dry weight,and SPAD readings were significantly decreased.With the increase of GA3 level,emergence percentage,plant height,root length,dry plant weight and SPAD value followed an upward trend first and then a downward trend.With the increase of GA3 concentration,leaf GA3 length was increased and leaf width was reduced.Our study indicated that the amendment of GA3 at 45 and 90 μg · kg-1 dry media generally produced good amending effects on seedling growth and biomass accumulation under salt stress.关键词
甜高粱/盐分胁迫/GA3/幼苗生长Key words
sweet sorghum/saline stress/GA3/seedling growth分类
农业科技引用本文复制引用
敖雁,宋旭东,安琳琳,陆世渊,周桂生..盐分胁迫及外源GA3调节对甜高粱幼苗生长的影响[J].扬州大学学报（农业与生命科学版）,2016,37(4):77-83,7.基金项目
国家自然科学基金资助项目(31171483) （31171483）
江苏省重点研发计划项目(BE2016345) （BE2016345）
江苏省农业科技自主创新资金项目(CX[16]1005) （CX[16]1005）
