POTENTIAL OF PLANT GROWTH REGULATOR AND CHLORMEQUAT CHLORIDE ON ALFALFA SEED COMPONENTS

文献类型： 外文期刊

第一作者： Chen, Ji-Shan

作者： Chen, Ji-Shan;Zhu, Rui-Fen;Lin, Hong;Han, Weibo;Ma, Li-Gong

作者机构：

关键词： Plant growth regulators;Chlormequat chloride;Alfalfa (Medicago sativa L.);Seed yield

期刊名称：PAKISTAN JOURNAL OF BOTANY （ 影响因子：0.972； 五年影响因子：0.988 ）

ISSN： 0556-3321

年卷期： 2016 年 48 卷 2 期

页码：

收录情况： SCI

摘要： The use of plant growth regulators (PGRs) has opened new prospects for increased seed production in grasses and legumes, but little information is available on the effects of PGRs combination with chlormequat chloride (CCC) on alfalfa (Medicago sativa L.) seed yield components. This study was conducted to evaluate the effects of applying chlormequat chloride in combination with three PGRs ( Naphthylacetic acid (NAA), gibberellic acid 3 (GA), and brassinolide (BR)) on seed yield, aboveground biomass, plant height, lodging, yield components. CCC was applied annually at the stooling stage while three PGRs were applied twice each year at the stages of flower bud formation and peak flowering. Results provides evidence that: (i) each PGR consistently increased seed yields, and the numbers of seeds per stem compared to untreated plants; (ii) CCC treatment reduced plant height and lodging, but also significantly decreased seed yield and did not affect aboveground biomass. (iii) effectiveness of CCC application depends on climatic conditions, especially in North-east China. (iiii) the optimum combination of CCC with a PGR to increase alfalfa seed production was failed to identify. (iiiii) no interactions between PGRs and CCC on seed yield were observed and neither the PGRs nor the CCC. But alfalfa seed yield could be improved by combining a PGR such as NAA. Our results suggest that these PGRs could be used in alfalfa breeding to increase seed yield while maintaining high seed quality.

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