Maternal mowing effect on seed traits of an invasive weed,Erigeron annuus in Farmland
Maternal mowing effect on seed traits of an invasive weed,Erigeron annuus in Farmland
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DOI：
10.17576/jsm-2015-4403-05
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发表时间：
2015-03
期刊：
影响因子：
0.8
通讯作者：
Y. Xiaohui;Li Jianghua;L. Zhen;Duan Shufeng;Z. Zhuo-wen;Meng Xuefeng;Wu Xiaojing;W. Yongjian
中科院分区：
文献类型：
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作者：
Y. Xiaohui;Li Jianghua;L. Zhen;Duan Shufeng;Z. Zhuo-wen;Meng Xuefeng;Wu Xiaojing;W. Yongjian
通过对刈割植株和未刈割植株的比较，探讨了母本刈割对农田入侵杂草一年蓬种子性状的影响。母株刈割效应导致种子质量、瘦果大小、冠毛长度和发芽率下降，瘦果大小、冠毛长度、散布距离和发芽不均匀性的变异增大。在一定程度上，遭受割草的个体可能通过增加这些变异来加速环境适应。本研究表明，农田平均割草量会抑制杂草E.一年生的然而，它也增加了种子的多样性，通过一个更不平等的规定，以分担风险的种子，并增加适合更广泛的异质性的农田条件。
The effect of maternal mowing on seed traits of an invasive weed, Erigeron annuus, in farmland was discussed by comparing mowing plants with intact (no-mowing) plants. The maternal mowing effect resulted in the decrease of seed mass, achene size, pappus length and germination percentage and the increase of variation in achene size, pappus length, dispersal distance and germination non-uniformity. To some extent, the individuals suffered mowing might accelerate the environmental adaptation through the increase of these variations. Our study indicated the mean of mowing in farmland will restrain the growth and reproduction of weed E. annuus. However, it also increases the diversity of seeds through a more unequal provision to seeds that shares the risk and increases fitness to a wider range of heterogeneity of farmland condition.