Reproductive Strategies in Mediterranean Legumes: Trade-Offs between Phenology, Seed Size and Vigor within and between Wild and Domesticated Lupinus Species Collected along Aridity Gradients.
Reproductive Strategies in Mediterranean Legumes: Trade-Offs between Phenology, Seed Size and Vigor within and between Wild and Domesticated Lupinus Species Collected along Aridity Gradients.
复制标题
DOI：
10.3389/fpls.2017.00548
复制
发表时间：
2017
影响因子：
5.6
通讯作者：
Ludwig C
中科院分区：
文献类型：
--
作者：
Berger JD;Shrestha D;Ludwig C
调查野生和驯化的地中海年度生殖策略，常见的花园比较旧世界羽扇豆收集沿着干旱梯度。这些都是生态生理学的优秀候选者，广泛分布在对比鲜明的环境中，具有不同的驯化历史，从古老的白羽扇豆到最近驯化的狭叶羽扇豆和羽扇豆，促进了自然选择和人类选择的研究。种子大小，早期活力和物候之间的权衡观察：活力增加，开花变得更早，种子大小增加。尽管所有这些特征都存在很大的具体差异，但自然选择和人类选择在所有3个物种中以非常相似的方式运作。在野生材料，采集环境变得干燥和炎热，物候期变得更早，而种子大小，早期活力和生殖投资增加。野生和驯化种质分离沿着相似的线。在类似的栖息地，驯化的材料始终较早，较大的种子，更大的早期活力和更高的生殖投资比野生，建议选择早期建立和及时成熟/干旱逃避在驯化和野生低降雨生态型。种间差异反映了它们的分布。种子小而软，活力低。鲁特乌斯的物候期较晚，对降雨敏感，专门适应长季节环境，并且沿海分布范围很窄。L. angustifolius更为保守;种子更硬，开花和成熟更早，具有广泛的地中海分布。L. albus开花早，但成熟晚得多，具有较长的生殖阶段，支持更大的种子大小和早期活力比任何L。luteus或L.狭叶蕨这种原始的/竞争性的组合似乎使L。albus具有广泛的适应能力，反映在其相对更广泛的地中海/北非分布。
To investigate wild and domesticated Mediterranean annual reproductive strategies, common garden comparisons of Old World lupins collected along aridity gradients were initiated. These are excellent candidates for ecophysiology, being widely distributed across contrasting environments, having distinct domestication histories, from ancient Lupinus albus to recently domesticated Lupinus angustifolius and Lupinus luteus, facilitating the study of both natural and human selection. Strong trade-offs between seed size, early vigor and phenology were observed: vigor increasing, and flowering becoming earlier with increasing seed size. Despite large specific differences in all these traits, natural and human selection have operated in very similar ways in all 3 species. In wild material, as collection environments became drier and hotter, phenology became earlier, while seed size, early vigor and reproductive investment increased. Wild and domesticated germplasm separated along similar lines. Within similar habitats, domesticated material was consistently earlier, with larger seeds, greater early vigor and higher reproductive investment than wild, suggesting selection for both early establishment and timely maturity/drought escape in both domesticated and wild low rainfall ecotypes. Species differences reflected their distribution. Small and soft-seeded, low vigor L. luteus had a late, rainfall-responsive phenology specifically adapted to long season environments, and a narrow coastal distribution. L. angustifolius was much more conservative; more hard-seeded, flowering and maturing much earlier, with a wide Mediterranean distribution. L. albus flowered earlier but matured much later, with longer reproductive phases supporting much larger seed sizes and early vigor than either L. luteus or L. angustifolius. This ruderal/competitive combination appears to give L. albus a broad adaptive capacity, reflected in its relatively wider Mediterranean/North African distribution.