Photosynthesis, respiration, and salt gland activity of Distichlis spicata in relation to soil salinity

Photosynthesis in Distichlis spicata was negatively correlated with soil salinity in both field and green-house plants. This relationship was stronger and statistically more significant in the greenhouse population where salinity and other environmental factors were more tightly controlled. In contr...

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Bibliographic Details
Published in:	Botanical gazette (Chicago, Ill.) Vol. 150; no. 4; pp. 346 - 350
Main Authors:	Warren, R.S. (Connecticut College, New London, CT), Brockelman, P.M
Format:	Journal Article
Language:	English
Published:	Chicago, IL The University of Chicago Press 01-12-1989 University of Chicago Press
Subjects:	Agronomy. Soil science and plant productions ALARGAMIENTO DEL TALLO ALLONGEMENT DE LA TIGE ASIMILACION ASSIMILATION Biological and medical sciences CONNECTICUT Economic plant physiology FEUILLE FOTOSINTESIS Fundamental and applied biological sciences. Psychology GRAMINEAE HALOPHYTES HOJAS LEAVES MARISMAS SALADAS Metabolism Net assimilation, photosynthesis, carbon metabolism. Photorespiration, respiration, fermentation (anoxia, hypoxia) Nutrition. Photosynthesis. Respiration. Metabolism PHOTOSYNTHESE PHOTOSYNTHESIS Photosynthesis, respiration. Anabolism, catabolism Plant growth Plant physiology and development PLANT SECRETIONS Plants PRE SALE PROPIEDADES FISICO-QUIMICAS (SUELO) PROPRIETE PHYSICO-CHIMIQUE DU SOL Pumping RESPIRACION RESPIRATION SALINIDAD SALINITE SALINITY Salt glands SALT TOLERANCE SALTMARSHES SECRECIONES DE LAS PLANTAS Secretion SECRETION VEGETALE SODIO SODIUM SODIUM PUMPING RATES SOIL CHEMICOPHYSICAL PROPERTIES Soil respiration Soil salinity Statistical significance STEM ELONGATION TIDAL MARSHES TOLERANCE AU SEL TOLERANCIA A LA SAL Salt gland Monocotyledones Correlation Growth Secretion Distichlis spicata Stem Salinity Soils Gramineae Angiospermae Spermatophyta Gas exchange Photosynthesis Respiration
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Summary:	Photosynthesis in Distichlis spicata was negatively correlated with soil salinity in both field and green-house plants. This relationship was stronger and statistically more significant in the greenhouse population where salinity and other environmental factors were more tightly controlled. In contrast, leaf respiration showed no significant correlation with soil salinity in either group of plants. Sodium ion pumping rates by leaf salt glands had a statistically significant positive correlation with soil salinity. When these rates were compared to leaf respiration, the relationship was also positive and statistically significant. We postulate that both reduced photosynthesis and increased leaf respiration contribute to the reduced stem growth found with increasing soil salinity.
Bibliography:	F60 9037074
ISSN:	0006-8071 1940-1205
DOI:	10.1086/337780