ISHS Acta Horticulturae 494: II International Symposium on Chestnut
LEAF CHLOROPHYLL PARAMETERS FROM NORTH- AND SOUTH-EXPOSED CANOPY SECTORS OF CHESTNUT (CASTANEA SATIVA MILL.) CV. LONGAL: RELATION TO LEAF AND FRUIT SIZES |
| Authors: | J.C.E. Gomes-Laranjo, V.M.F. Galhano, M.S.B.C. Torres-Pereira, J.M.G. Torres-Pereira |
| Keywords: | Chestnut, photosynthesis, chlorophyll, sun leaves, shade leaves |
| Abstract:
Photonic irradiance plays an important role in the architecture of chloroplast thylakoid membranes, which are able to adapt themselves to environmental conditions. In adult chestnut plants it is possible to identify, through leaf chlorophyll parameters, at least the shady (North) and the sunny (South) sides in each canopy. The sunny side has in general more available PAR than the North side. The sunny leaves have higher specific weight and more total chlorophyll (Chl total) per leaf unit area but less Chl total per unit of leaf weight. As such, Chl alChl b ratios are higher, enabling higher photosynthetic productivity. Leaf and fruit sizes also differ according to canopy side, being greater in the South side. | |
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