学术
沙丘区植物植冠储藏种子的活力和萌发特征
马君玲[1,2] 刘志民[1]
[1]中国科学院沈阳应用生态研究所,沈阳110016 [2]中国科学院研究生院,北京100039
摘 要:
研究了科尔沁沙地10种植物的植冠储藏（成熟后在植冠中保留至翌年5月）种子的活力及萌发特性．结果表明：典型沙生植物（流动沙丘及半固定沙丘植物）沙蓬、乌丹蒿和差巴嘎蒿的植冠储藏种子80％以上具有活力，而非典型沙生植物的植冠储藏种子有活力的不足80％，甚至在30％以下；典型沙生植物的植冠储藏种子表现出“速萌型”的萌发特征．植冠种子库使典型沙生植物种子的脱落延迟到风季结束、雨季来临的时候，而且此时的种子活力较高、萌发迅速．植冠种子库是典型沙生植物适应流沙和季节性干旱的主要方式之一。[著者文摘]
文章出处:
《应用生态学报》-2008年19卷2期 -252-256页
分 类 号:
文献标识码:
A
文章编号:
1001-9332（2008）02-0252-05
Viability and germination characteristics of canopy-stored seeds of plants in sand dune area
MA Jun-ling, LIU Zhi-min（ 1.Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China ; 2Graduate University of Chinese Academy of Sciences, Beijing 100039, China ）
Abstract:
The study on the viability and germination characteristics of canopy-stored seeds remained in canopy until next May after maturation of 10 plants species in Horqin sandy land showed that more than 80% of the canopy-stored seeds of psammophytes such as Agriophyllum squarrosum, Artemisia wudanica and A. halodendron had viability, while less than 80% or even less than 30% of non-psammophytes seeds had viability. The canopy-stored seeds of psammophytes presented a rapid germination pattern. The canopy seed bank made the seed release of psammophytes postponed until the windy season ended and the rainy season started, when the seeds had high viability and could germinate rapidly. The canopy seed bank is one of ways for psammophytes to adapt drift sand and seasonal drought.[著者文摘]
Key words:
psammophyte; seedling recruitment; population colonization; Horqin sandy land.
基金资助:
国家自然科学基金项目（40671119）和国家科技支撑计划资助项目（2006BAC01A12）.
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