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EFFECTS OF FLOODING ON LEAF WATER POTENTIAL AND STOMATAL RESISTANCE IN BRUGUIERA GYMNORRHIZA (L.) LAM
Author(s) -
NAIDOO G.
Publication year - 1983
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1983.tb03437.x
Subject(s) - bruguiera , flooding (psychology) , stomatal conductance , biology , botany , horticulture , agronomy , photosynthesis , ecology , psychology , mangrove , psychotherapist
SUMMARY The effects of 10, 20, 40 and 80 days of flooding on stomatal responses in the halophyte, Bruguiera gymnorrhiza (L.) Lam were investigated. Measurements were made of leaf water potential and stomatal resistance ( r g ) during the period of flooding, and continuing for 12 to 14 days after its termination. Generally, plants flooded for prolonged periods had lower leaf water potentials than the controls both during and after flooding. Prolonged flooding also resulted in higher r g during flooding and continuing for 8 to 10 days afterwards. Leaf water potentials decreased with increase in the duration of flooding. Decrease in leaf water potential was also associated with an increase in r g . Prolonged flooding also resulted in ultrastructural modifications. The chloroplasts had smaller grana and the lamellae were considerably swollen. There also appeared to be some degradation of thylakoid membrane structure.