Photosynthetic Units of Sun and Shade Plants 1

AUTOR(ES)

Malkin, Shmuel

RESUMO

A computer analysis of fluorescence induction curves of leaves treated with 3-(3,4-dichlorophenyl)-1,1 dimethylurea was done for several species. These measurements gave the ratios of the total chlorophyll to photosystem II reaction centers. This communication is a preliminary survey of sun and shade plants and demonstrates a significant variation in this ratio. In the sun plants, the photosynthetic unit sizes (chlorophyll reaction centers) varied between 220 to 480. The shade plants gave numbers mostly in the range between 630 to 940. The computer analysis of the fluorescence data also gave the connectivity parameter of energy transfer between photosynthetic units of photosystem II which varied between 0.2 and 0.5 but did not show any obvious correlation to the photosynthetic unit size.

Documentos Relacionados

• Photosynthetic Rates of Sun versus Shade Leaves of Hyptis emoryi Torr. 1
• Environmental Effects on Photosynthesis, Nitrogen-Use Efficiency, and Metabolite Pools in Leaves of Sun and Shade Plants 1
• Comparisons of Photosynthetic Responses of Xanthium strumarium and Helianthus annuus to Chronic and Acute Water Stress in Sun and Shade 1
• Photosynthetic Adaptation of Solanum dulcamara L. to Sun and Shade Environments: II. Physiological Characterization of Phenotypic Response to Environment 1
• EFFECT OF SUN AND SHADE ON PIGMENT DEVELOPMENT