环境因子对龙脑香科幼苗的生长和存活的影响研究进展

Impacts of Environmental Factors on Growth and Survival of Dipterocarpaceae Seedlings: Recent Advances

摘要:

就光照、水分、动物捕食和菌根共生体对龙脑香科植物 (Dipterocarpaceae) 幼苗生长与死亡的影响进行了简要综述，并对未来研究的发展方向作一展望。光照是影响龙脑香科植物幼苗生长和存活的最重要的资源条件，林窗中的较强光照有利于幼苗的生长与存活。引起龙脑香科植物幼苗死亡的主要原因是干旱；脊椎动物捕食增加龙脑香科植物幼苗的死亡，昆虫对幼苗叶片捕食造成的死亡只发生在叶片大量损失或幼苗较小的情况下。龙脑香科植物幼苗能通过与真菌形成共生体从成年植株获得营养和水分供应而促进幼苗生长，尤其在资源亏缺的条件下更为明显。

Abstract:

Progress in the study of the influences of light, water, herbivory and fungal symbiont on the growth and survival of Dipterocarpaceae seedlings is briefly summarized, and the prospects in the future are also discussed. Light is the most important resource condition influencing the growth and survival of Dipterocarpaceae seedlings and the higher irradiance in canopy gaps is benefitial to seedling growth and survival. The death of Dipterocarpaceae seedlings is closely linked to the drought and greatly increased by the vertebrate herbivory, but only a high proportion of foliar herbivory caused by insect could result in the death of seedlings, especially small individuals. Dipterocarpaceae seedlings have the ability to establish the fungal symbiont, which helps them to absorb nutrients and water from mature plants and benefits to their growth, especially in the extreme deficiency of resources.