ISSN: 0041-3216

ISSN: 0041-3216 (Online), 0041-3216 (Print)
Volume 61 Number 4
Research Papers
Comparative study of photosynthesis in several Hevea brasiliensis clones and Hevea species under tropical field conditions
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Net photosynthesis in 20 different Hevea brasiliensis clones and six Hevea species (native to Brazil) were measured under tropical field conditions in West-Malaysia using infrared gas analysis technique. Photosynthetic photon flux density (PPFD) response curves of net photosynthesis were studied and PPFD-compensation point photosynthetic quantum yield (PQY), dark respiration rate (ORR) and maximum net photosynthesis (PMAX) values were derived. Differences among clones and species are reported and discussed.
Keywords: Rubber; photosynthesis; Instrumental methods of analysis