The effect of the light regime on the structure and photosynthetic activity of leaves and the degree of differentiation of winter buds in grapevines. II. The plastid pigment content and photosynthetic intensity of the leaves of the cultivar Bolgar in relation to shading

Pandeliev, S.; Tsankov, B.; Braikov, D.

Gradinarska i Lozarska Nauka 13(8): 97-105

1976


ISSN/ISBN: 0436-2624
Accession: 000536733

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Abstract
Vineyard microclimate, created between the plants by restricted access of solar radiation and raised air temperature, increased leaf plastid pigment synthesis and retarded breakdown at the end of the growth period. During the adaptation of plants to shading, leaves with xerophytic characteristics were produced which depended on a lower radiation energy absorption coefficient in the yellow-green region of the spectrum. No direct correlation was found between chlorophyll content and photosynthetic intensity in restricted light.