NDLI: Ecophysiological and floristic implications of sex expression in the dioecious neotropical CAM tree Clusia hilariana Schltdl.

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Growth dynamics of oak seedlings (Quercus macrocarpa Michx. and Quercus muhlenbergii Engelm.) from gallery forests: implications for forest expansion into grasslands

Ecophysiological and floristic implications of sex expression in the dioecious neotropical CAM tree Clusia hilariana Schltdl.

Storage duration and temperature effect on the functional integrity of container and bare-root Pinus radiata D. Don stock-types

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Trees : Volume 15, Issue 4, May 2001

Trees : Volume 15, Issue 3, March 2001

Trees : Volume 15, Issue 2, January 2001

Trees : Volume 15, Issue 1, October 2000

Ecophysiological and floristic implications of sex expression in the dioecious neotropical CAM tree Clusia hilariana Schltdl.

Content Provider	Springer Nature Link
Author	Liebig, Markus Scara, Fabio de Mattos, Eduardo Zaluar, Henrique Lüttge, Ulrich
Copyright Year	2001
Abstract	Clusia hilariana Schlechtendal is a dioecious tree performing crassulacean acid metabolism (CAM). It grows in the sandy coastal restinga of Brazil. As pioneers and 'nurse plants' individual trees become surrounded by other vegetation forming isolated vegetation islands on the sand plain. The female plants produce large and heavy fleshy fruits suggesting a particular demand for resources. Frugivores may introduce nutrients (faeces) and diaspores into the stands of female plants. Thus, the hypothesis was advanced that sex expression in C. hilariana has important general consequences for the physiology of the trees themselves and also determines aspects of the vegetation around them. Field work in the restinga of Macaé (Rio de Janeiro State, Brazil) showed that morphological leaf characteristics, the expression of CAM and the species diversity and species composition of their respective vegetation islands were similar for both sexes. The female plants had somewhat higher chlorophyll levels. Differences in effective quantum yield of photosystem II (PS II) and non-photochemical quenching of chlorophyll a fluorescence between female and male plants were very small. Female plants were a little less subject to acute photoinhibition at noon. Maximum fluorescence (Fm), variable fluorescence (Fv) and minimum fluorescence (F 0) were significantly lower in female plants. However, maximum quantum yield ratio of male to female plants as well as fluorescence yield ratio and minimum fluorescence ratio of male to female plants related to chlorophyll content were all close to unity. Therefore, although there may be some fine-tuned differences in the light reactions of photosynthesis, PS II of male and female plants are not different. Hence, the hypothesis of possible important consequences of sex determination for expression of morphological and physiological traits of the plants and for the composition of the 'nursed' vegetation underneath them must be rejected.
Starting Page	278
Ending Page	288
Page Count	11
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	15
Issue Number	5
e-ISSN	14322285
Language	English
Publisher	Springer-Verlag
Publisher Date	2001-05-11
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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Spatio-temporal variation of photosynthetic pigments in the CAM tree Clusia hilariana Schlechtendal associated with dry spells during the rainy season in southeastern Brazil

Expression of crassulacean acid metabolism in Clusia hilariana Schlechtendal in different stages of development in the field

Photosynthetic changes and oxidative stress caused by iron ore dust deposition in the tropical CAM tree Clusia hilariana

Germination biology and seedling growth of Clusia hilariana Schltdl., a dominant CAM-tree of drought-prone sandy coastal plains

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Early detection of injuries in leaves of Clusia hilariana Schltdl. (Clusiaceae) caused by particulate deposition of iron

Ecophysiological and floristic implications of sex expression in the dioecious neotropical CAM tree Clusia hilariana Schltdl.

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