Germination season and watering regime, but not seed morph, affect life history traits in a cold desert diaspore-heteromorphic annual.
Germination season and watering regime, but not seed morph, affect life history traits in a cold desert diaspore-heteromorphic annual.
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DOI：
10.1371/journal.pone.0102018
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Baskin CC
中科院分区：
文献类型：
--
作者：
Lu JJ;Tan DY;Baskin JM;Baskin CC
种子形态、非生物条件和萌发时间可以影响植物的适合性，但很少有研究测试它们对植物生活史性状可塑性的联合影响。因此，我们验证了种子形态、萌发季节和浇水制度影响一水硬铝石-异形性寒地冬季/春季短暂的狭叶龙竹萌发后生活史性状表型表达的假说。这两个种子形态在夏末分别在浇水和不浇水的地块播种，从它们衍生出来的植物在整个研究过程中都被浇水或不浇水。种子形态不影响物候、生长形态、存活率、干物质积累和分配、角果和种子产量。浇水小区的种子在秋季(AW)和春季(SW)萌发，而非浇水小区(SNW)的种子只在春季萌发。AW、SW和SNW植株存活和繁殖的比例较高，但秋、春萌发植株的开花日期和花期不同。干物质含量也因发芽季节/浇水制度不同而不同(AW>；SW>；SNW)。角果数和种子数随植株大小增加(AW>；SW>；SNW)，但分配给生殖的干物质百分比较高：SNW>；SW>；AW。因此，虽然种子形态不影响生活史性状的表达，但萌发季节和浇水制度显著影响物候、植株大小和生物量的积累和生殖分配。整个生命周期的灵活性是对其寒冷沙漠栖息地降雨量和时间的变化的一种适应。
Seed morph, abiotic conditions and time of germination can affect plant fitness, but few studies have tested their combined effects on plasticity of plant life history traits. Thus, we tested the hypothesis that seed morph, germination season and watering regime influence phenotypic expression of post-germination life history traits in the diaspore-heteromorphic cold desert winter annual/spring ephemeral Diptychocarpus strictus. The two seed morphs were sown in watered and non-watered plots in late summer, and plants derived from them were watered or not-watered throughout the study. Seed morph did not affect phenology, growth and morphology, survival, dry mass accumulation and allocation or silique and seed production. Seeds in watered plots germinated in autumn (AW) and spring (SW) but only in spring for non-watered plots (SNW). A high percentage of AW, SW and SNW plants survived and reproduced, but flowering date and flowering period of autumn- vs. spring-germinated plants differed. Dry mass also differed with germination season/watering regime (AW > SW > SNW). Number of siliques and seeds increased with plant size (AW > SW > SNW), whereas percent dry mass allocated to reproduction was higher in small plants: SNW > SW > AW. Thus, although seed morph did not affect the expression of life history traits, germination season and watering regime significantly affected phenology, plant size and accumulation and allocation of biomass to reproduction. Flexibility throughout the life cycle of D. strictus is an adaptation to the variation in timing and amount of rainfall in its cold desert habitat.
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十字花科异果性冬季一年生/春季短暂冷漠物种的表型可塑性和下注对冲
影响因子：
3.4
作者：
Lu, Juan J.;Tan, Dun Y.;Baskin, Carol C.
通讯作者：
Baskin, Carol C.
影响因子：
3.4
作者：
MARKS, M;PRINCE, S
通讯作者：
PRINCE, S
DOI：
10.1139/b94-003
发表时间：
1994-01-01
期刊：
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影响因子：
--
作者：
SANS, FX;MASALLES, RM
通讯作者：
MASALLES, RM
影响因子：
4.8
作者：
VENABLE, DL;BURQUEZ, A;ESPINOSA, F
通讯作者：
ESPINOSA, F
影响因子：
4.2
作者：
Lu, Juanjuan;Tan, Dunyan;Baskin, Carol C.
通讯作者：
Baskin, Carol C.