Seed treatments alleviate dormancy of field bindweed (Convolvulus arvensis L.)

文献类型： 外文期刊

第一作者： Renci Xiong

作者： Renci Xiong;Ying Wang;Hanwen Wu;Yan Ma;Weili Jiang;Xiaoyan Ma

作者机构： College of Plant Science, Tarim University, Alaer, China;Graham Centre for Agricultural Innovation, Wagga Wagga Agricultural Institute, NSW Department of Primary Industries, Wagga Wagga, NSW, Australia;State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China

关键词： Dormancy breaking; germination; seed treatment; hard seed coat

期刊名称：WEED TECHNOLOGY （ 2020影响因子：1.884； 五年影响因子：1.917 ）

ISSN： 0890-037X

年卷期： 2018 年 32 卷 5 期

页码：

收录情况： SCI

摘要： Field bindweed, a member of the Convolvulaceae family, is a problematic perennial weed in cotton fields and orchards in northwest China. The species exhibits strong seed dormancy, causing delayed germination. A clear understanding of the mechanisms involved in alleviating seed dormancy is important for effective plant propagation and successful management of field bindweed. Experiments were conducted to investigate seed germination and radicle growth of field bindweed by breaking seed dormancy using mechanical scarification, sulfuric acid, hot-water scarification, cold stratification, and chemical treatment. Chemical treatments (gibberellic acid or potassium nitrate) had no effect on breaking seed dormancy, whereas mechanical scarification (sandpaper and blade) resulted in 92% to 98% seed germination, indicating that seed dormancy of field bindweed was mainly due to the presence of a hard seed coat. Seeds pretreated with 80% sulfuric acid for 15 to 60 min or 98% sulfuric acid for 15 to 30 min had germination rates above 80%, and soaking seeds in 70 degrees C water for 4 to 16 min or in boiling water for 5 to 20 s were effective in breaking seed dormancy but had no effect on the radicle growth of field bindweed. Cold stratification at 5 degrees C for 2 to 8 wk partially accelerated seed dormancy release, resulting in 53% to 67% seed germination. Results indicated that field bindweed could potentially form a persistent soil seed bank with physically dormant seed; therefore, strategies for eliminating seed production should be adopted.

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