农药学学报2017，Vol.19Issue(3)：331-340,10.DOI:10.16801/j.issn.1008-7303.2017.0043
赤霉素GA4+7种子引发处理对玉米光合作用及产量的影响
Effect of gibberellin (GA4+7) priming treatment on photosynthesis and yield of maize
摘要
Abstract
In this study, the effect of gibberellin seed soaking on photosynthesis of maize has been studied, which provided a theoretical basis for the application of exogenous hormone on maize growth and seed processing. The seeds of maize (Zhengdan 958) were taken as experimental materials. 10, 60, 120 mg/L gibberellin (GA4+7) solutions were employed to soak and dry the seeds. The parameters of leaf photosynthesis and chlorophyll fluorescence, photosynthetic pigment content, leaf area and photosynthate accumulation were tested in the field. The results showed that priming the seeds with GA4+7 can improve the net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, leaf area per plant, dry matter accumulation and photosynthetic pigment content and reduce the ratio of Chl a and Chl b, which effectively decreased the initial fluorescence (F0) and increased the maximal fluorescence (Fm), photochemical efficiency of PSⅡ(Fv/Fm) and quantum yield (⊿F/Fm′). Thus, it enhanced the hundred kernel weight and grain yield, and the most obvious effect was the sample treated with 60 mg/L GA4+7 (G2) among all these experiments results. In three-leaf stage, seven-leaf stage and jointing stage, compared with the control, the net photosynthetic rate of G2 significantly increased by 74.3%, 42.6% and 39.6% (P < 0.05), respectively. The leaf area per plant significantly improved by 30.9%, 48. 5% and 24.1% (P < 0.05), respectively. Moreover, dry matter accumulation sharply increased by 19.6%, 46.9% and 52.9% (P < 0.05), respectively. The chlorophyll content was raised by 21.5%, 12.1% and 11.1% (P < 0.05), respectively. As a result, the hundred kernel weight and the grain yield has increased by 6.0% and 9.7% (P < 0.05), respectively.关键词
赤霉素/玉米种子/种子引发/光合参数/光合色素含量/荧光参数/产量Key words
gibberellin/maize seeds/seed priming/photosynthetic parameters/photosynthetic pigment content/fluorescence parameters/yield分类
农业科技引用本文复制引用
左冰云,解君,韩清芳,崔雯雯,刘铁宁,王兴义,丁瑞霞..赤霉素GA4+7种子引发处理对玉米光合作用及产量的影响[J].农药学学报,2017,19(3):331-340,10.基金项目
国家高技术研究发展计划(863计划)课题(2013AA102902) （863计划）
"十二五"国家科技支撑计划(2012BAD09B03) （2012BAD09B03）
高等学校学科创新引智计划项目(B12007). （B12007）
