Effects of predispersal insect seed predation on the early life history stages of a rare cold sand-desert legume.
Effects of predispersal insect seed predation on the early life history stages of a rare cold sand-desert legume.
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传播前昆虫种子捕食对稀有冷漠豆科植物早期生活史阶段的影响
DOI：
10.1038/s41598-018-21487-7
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发表时间：
2018-02-19
影响因子：
4.6
通讯作者：
Wu MY
中科院分区：
文献类型：
--
作者：
Han YJ;Baskin JM;Tan DY;Baskin CC;Wu MY
昆虫对具有物理休眠的豆科植物种子的捕食是常见的。然而，昆虫种子捕食的后果与PY豆科植物的生活史研究很少。在最大的种子植物属黄芪（豆科）中，只有一项研究测试了昆虫捕食对发芽的影响，没有直接测试过它对幼苗存活的影响。因此，我们测试了昆虫捕食对种子萌发和幼苗生长的影响，以及中亚沙漠特有的Astragalus lehmannianus的存活。在实验室条件下，种子轻微提前在自然栖息地的多年生豆科植物发芽到一个更高的百分比比完整的种子，从提前和nonpredated种子的幼苗存活下来，生长同样好。此外，与我们的预测相反，在中国西北地区，在接近自然的条件下，“反季节”发芽的早生种子的幼苗在冬季存活了下来。我们的研究结果的含义是，从早发芽（在我们的情况下，秋天）的种子的个别植物可能有一个健身优势，从nonpredated种子，延迟发芽，直到次年春天。
Seed predation by insects is common in seeds of Fabaceae (legume) species with physical dormancy (PY). However, the consequences of insect seed predation on the life history of legumes with PY have been little studied. In the largest genus of seed plants,Astragalus(Fabaceae), only one study has tested the effects of insect predation on germination, and none has tested it directly on seedling survival. Thus, we tested the effects of insect predation on seed germination and seedling growth and survival ofAstragalus lehmannianus, a central Asian sand-desert endemic. Under laboratory conditions, seeds lightly predated in the natural habitat of this perennial legume germinated to a much higher percentage than intact seeds, and seedlings from predated and nonpredated seeds survived and grew about equally well. Further, in contrast to our prediction seedlings from predated seeds that germinated “out-of-season” under near-natural conditions in NW China survived over winter. The implication of our results is that individual plants from predated seeds that germinate early (in our case autumn) potentially have a fitness advantage over those from nonpredated seeds, which delay germination until spring of a subsequent year.
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影响因子：
4.8
作者：
KOPTUR, S;LAWTON, JH
通讯作者：
LAWTON, JH
环境因素与中国草地植物多样性-生产力关系相关。
影响因子：
6.4
作者：
Ma, Wenhong;He, Jin-Sheng;Schmid, Bernhard
通讯作者：
Schmid, Bernhard
影响因子：
3
作者：
Kaye, TN
通讯作者：
Kaye, TN
影响因子：
2.3
作者：
CENTER, TD;JOHNSON, CD
通讯作者：
JOHNSON, CD
影响因子：
4.8
作者：
CENTER, TD;JOHNSON, CD
通讯作者：
JOHNSON, CD