红树植物对低光照水平的生长及生理生态响应研究进展

The Growth and Physiological Ecological Responses of Mangroves to Low Light Level: A review

一般低光照水平对植物生长的影响是不利的。这些不利的影响也体现在生长于热带、亚热带潮间带的红树植物身上。低光照水平下红树植物的繁殖体萌发受到影响,依受体植物的不同,这种影响既有促进作用亦有抑制作用。生理生态方面的响应包括植株的光合速率下降、植物生长激素分泌增加,从而引起植物个体生长发育方面的茎高生长增加但生物量下降。由于幼苗生长受到抑制,以及捕食者的数量增加和活跃化,低光照水平导致红树植物群落的更新和演替也同样受到抑制。虽然低光照水平在个体、种群和群落水平上对红树植物产生的影响大部分是不利的,但深入探究红树植物对低光照水平的生长及生理生态响应,可以为红树林的育苗、造林和演替阶段研究提供有益的参考。

Generally, low light level is adverse to plant growth. the mangroves, which is belting the tropical and subtropical These disadvantageous effects were represented by intertidal flats. The germination of mangroves propagule was impacted by low light level. Based on the plant receptors, these impacts were dualistic, including accelerating and retarding. The responses of physiological ecology included decrease of photosynthetic rate, in- crease of plant growth hormones, further, increase of stem growth elongation, and decrease of biomass on individual growth and development. Since the growth of seedlings and saplings were inhibited, and predatorsincreased and were activated, low light level resulted in the inhibition of regeneration and succession of mangroves communities. Even low light level was adverse to mangroves on individual, population and community level;however, much deeper researches on the growth and physiological ecology responses of mangroves to low light level are helpful and useful to studies of mangroves nursery, afforestation and succession stages.