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Germination time influences post-germination life-history traits and progeny seed germination patterns in the desert annual Erodium laciniatum (Geraniaceae)
Botany ( IF 1.0 ) Pub Date : 2020-09-24 , DOI: 10.1139/cjb-2020-0001
Nasr H. Gomaa 1, 2
Affiliation  

Botany, Volume 98, Issue 10, Page 563-573, October 2020.
Annual plants in arid regions germinate at different times within a growing season, from early in the season to late, and this may affect post-germination traits. For this study, I tested the effect of germination timing on post-germination life-history traits, including progeny seed germination in the desert annual Erodium laciniatum var. pulverulentum (Cav.) Boiss. Traits of November- and February-germinated individuals were studied in a field survey carried out in northwestern Saudi Arabia, and the germination of freshly matured and after-ripened seeds from both early- and late-germinated plants was assessed. Overall, E. laciniatum showed significant phenotypic plasticity in life-history traits arising from different germination times. Density, survivorship and reproductive success of early-germinated plants were all significantly greater than for those that germinated later. Late-germinated plants flowered earlier, bolted at smaller size and allocated more biomass to reproduction than did early-germinated individuals. Delayed germination shortened both flowering period and life span. Seeds produced by late-germinated plants had greater germination percentage than did seeds from early-germinated plants.


中文翻译:

发芽时间会影响沙漠一年生小球藻(Geraniaceae)的发芽后生活史特征和后代种子发芽模式。

植物学,第98卷,第10期,第563-573页,2020年10月。
干旱地区的一年生植物在生长季节的不同时间发芽,从季节的早期到晚期,这可能会影响发芽后的性状。在这项研究中,我测试了发芽时机对发芽后生活史特征的影响,包括沙漠一年生食蚁龙(Erodium laciniatum var)的后代种子发芽。肺泡粉 在沙特阿拉伯西北部进行的田野调查中研究了11月和2月发芽的个体的性状,并评估了早发和晚发植物的新鲜成熟和成熟后种子的发芽率。总体而言,E.laciniatum在不同发芽时间引起的生活史特征中表现出显着的表型可塑性。密度,早期发芽的植物的存活率和繁殖成功率均显着高于后来发芽的植物。与早期发芽的个体相比,晚期发芽的植物开花较早,插花较小,为繁殖分配的生物量更多。延迟发芽缩短了开花期和寿命。晚发芽植物产生的种子比早发芽植物种子具有更高的发芽率。
更新日期:2020-10-07
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