Impact of substrate salinity on caloric value, energy accumulation and its distribution in various organs of Bruguiera gymnorrhiza seedlings

Abstract

Abstract: The study with artificial culture showed that the accumulation of dry matter, energy in Bruguiera gymnorrhiza seedlings was promoted by low substrate salinity,but inhibited by high substrate salinity,which peaked at 10mg·g ^-1 substrate salinity.With the increase of substrate salinity, the dry matter, the energy tended to be allocated to the micro-roots, leaves, which are nutrient-absorbing organ, photosynthetic organ, respectively.With the increase of substrate salinity, the changes in caloric values were differed in various organs of B. gymnorrhiza seedlings,and those in leaves could reflect the changes in the salt-resistance of the seedlings.

Key words: Mangroves, Bruguiera gymnorrhiza, Salt stress, Caloric value, Energy, nonstructural carbohydrate, fine root respiration, soil warming, respiration acclimation

CLC Number:

Q945

WANG Wenqing, YE Qinghua, WANG Xiaomei, LIN Peng . Impact of substrate salinity on caloric value, energy accumulation and its distribution in various organs of Bruguiera gymnorrhiza seedlings[J]. Chinese Journal of Applied Ecology, 2001, 12(1): 8-12.

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