01257naa a2200193 a 450000100080000000500110000800800410001902400280006010000260008824501270011426000090024152006360025065000140088665000230090065300220092370000170094570000250096277300760098719855772022-10-19       1993    bl uuuu     u00u1 u    #d7 a10.1007/BF013875242DOI1 aLEMOS FILHO, J. P. de  aResponses of Hevea brasiliensis Muell. Arg. plants to low temperatures under controlled conditions.h[electronic resource]  c1993  aIn this study we have examined the responses ofHevea 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° S in Brazil.  aClorofila  aHevea Brasiliensis  aBaixa temperatura1 aPINTO, H. S.1 aROCHA NETO, O. G. da  tInternational Journal of Biometeorologygv. 37, n. 4, p. 203-206, 1993.