HOW DOES A MISTLETOE AFFECT THE WATER, NITROGEN AND CARBON BALANCE OF 2 MANGROVE ECOSYSTEM SPECIES

被引：13

作者：

OROZCO, A ^{[1
]}

RADA, F ^{[1
]}

AZOCAR, A ^{[1
]}

GOLDSTEIN, G ^{[1
]}

机构：

[1] UNIV LOS ANDES,FAC CIENCIAS,CTR INVEST ECOL ANDES TROP,MERIDA,VENEZUELA

来源：

PLANT CELL AND ENVIRONMENT | 1990年 / 13卷 / 09期

关键词：

PHTHIRUSA-MARITIMA; CONOCARPUS-ERECTUS; COCCOLOBA-UVIFERA; MISTLETOE; MANGROVES; WATER RELATIONS; CARBON BALANCE;

D O I：

10.1111/j.1365-3040.1990.tb01984.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The effect of a mistletoe, Phthirusa maritima, on the water, nitrogen and carbon balance of two mangrove host species, Conocarpus erectus and Coccoloba uvifera, was studied. Several daily cycles of water potential and its components (pressure-volume curves); leaf nitrogen content (Kjeldahl method); leaf conductance, transpiration rates and carbon assimilation (portable gas exchange system) were measured on mistletoe, infested and uninfested plants in the Caribbean coast of Venezuela. The mistletoe on both host species showed higher transpiration rates and lower CO2 assimilation rates, and therefore lower water use efficiencies. With respect to infested and uninfested plants, C. erectus did not show large differences in the parameters measured with the exception of assimilation rates which were significantly lower in the infested plants. On the other hand, C. uvifera did show differences in all parameters and, therefore, was affected to a greater degree by the mistletoe. The behaviour of mistletoe-infested and uninfested plants, with respect to habitats with different degrees of water stress and with respect to the salinity gradient in which these mangroves grow, is discussed.

引用

页码：941 / 947

页数：7

共 24 条

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