Aerial seed bank in Artemisia species: how it responds to sand mobility
Aerial seed bank in Artemisia species: how it responds to sand mobility
复制标题
蒿属植物的空中种子库：它如何应对沙子流动性
DOI：
10.1007/s00468-010-0411-3
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发表时间：
2010-06-01
影响因子：
2.3
通讯作者：
Liu, Bo
中科院分区：
文献类型：
--
作者：
Ma, Junling;Liu, Zhimin;Liu, Bo
干旱沙丘生态系统中存在气生种子库。然而，空中种子库的关系，沙流动强度是未知的。分析了内蒙古东北部不同生境中4种优势蒿属植物空中种子库对风沙流的适应性。这4种植物分别是：毛叶蒿（Artemisia gmelinii）、毛叶蒿（A. frigida、冷枝草A. halodendron和A. wudanica分别是沙丘间低地、稳定沙丘、半稳定沙丘和活动沙丘物种。研究了4种植物种子（瘦果和头状花序）在母株上的存留、土壤种子库的补充、种子生活力的维持以及埋深对种子出苗的影响。种间扩散延迟随沙流强度的变化而不同：A在成熟后的第二年5月扩散最快; wudanica在4月成熟后，在4月的第二天，A. halodendron种子成熟当年的11月，A. frigida和A. gmelinii。土壤种子库的最大补充量为A. wudanica和A.梭梭分别发生在次年5月和3月。研究了瘦果的生活力。wudanica和A.梭梭在成熟后的第二年5月保持在79.5%和79.6%。
Aerial seed bank has been found in the arid dune ecosystem. However, the relationship of aerial seed bank to sand mobility intensity is unknown. The adaptation of aerial seed bank to sand mobility was analyzed in four Artemisia species dominating at different habitats in northeastern Inner Mongolia, China. The four species, Artemisia gmelinii,A. frigida,A. halodendron and A. wudanica, are an interdune lowland, stabilized dune, semi-stabilized dune and active dune species, respectively. Seed (achene and capitulum) persistence on the parent plants, the supplement for the soil seed bank, the maintenance of seed viability, and the effect of burial depth on seedling emergence of these four species were studied. Dispersal delay differed interspecifically responding to sand mobility intensity: maximal dispersal was in the following May after maturation for A. wudanica, in the following April after maturation for A. halodendron, and in November of the year of seed maturation for A. frigida and A. gmelinii. The maximal supplement to the soil seed bank for A. wudanica and A. halodendron occurred in the following May and March, respectively. The viability of achenes in aerial seed bank of A. wudanica and A. halodendron maintained at 79.5 and 79.6% until the following May after maturation.