Responses of Hevea brasiliensis Muell. Arg. plants to low temperatures under controlled conditions

In this study we have examined the responses of Hevea plants to low temperatures in growth chambers simulating winter conditions in the tropics. The low temperatures increased the leaf diffusive resistance even with a rise in the leaf temperatures toward the end of day. The total chlorophyll levels...

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Bibliographic Details
Published inInternational journal of biometeorology Vol. 37; no. 4; pp. 203 - 206
Main Authors Lemos Filho, J.P. de, Pinto, H.S, Rocha Neto, O.G. da
Format Journal Article
LanguageEnglish
Published 01.12.1993
Subjects
air temperature
chilling injury
chlorophyll
Hevea brasiliensis
leaf diffusion resistance
membrane permeability
tropics
winter
Brazil
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Summary:In this study we have examined the responses of Hevea plants to low temperatures in growth chambers simulating winter conditions in the tropics. The low temperatures increased the leaf diffusive resistance even with a rise in the leaf temperatures toward the end of day. The total chlorophyll levels were reduced by chilling, with no changes in the chlorophyll a/b ratio. Neither organic solute nor electrolyte leakage were observed at low temperatures. These results explain the low growth rate of plants and the lack of serious chilling symptoms necrosis) in mature leaves during winter conditions near latitude 22 degrees S in Brazil.
ISSN:0020-7128
1432-1254
DOI:10.1007/BF01387524