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Some Morphological and Biochemical Characteristics of C 3 and C 4 Plants Irradiated with UV‐B
Author(s) -
BASIOUNY FOUAD M.,
VAN T. K.,
BIGGS R. H.
Publication year - 1978
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1978.tb01533.x
Subject(s) - photosynthesis , irradiation , ozone , botany , chemistry , chlorophyll a , radiation , dry weight , assimilation (phonology) , chlorophyll , carbon assimilation , horticulture , biology , linguistics , physics , philosophy , organic chemistry , quantum mechanics , nuclear physics
Four C 3 and two C 4 plants were subjected for 350 h to an enhanced UV‐B radiation (280 to 310 nm) regime simulating a 0.18 atm. cm ozone level (solar angle 55°) in growth chamber. Different degrees of response among plant species were observed. UV‐B radiation reduced plant height, fresh and dry weight, protein content, total chlorophyll, inhibited net CO 2 uptake and the Hill reaction activity. Some broad‐leaved species with C 3 type of carbon assimilation were more susceptible to UV‐B alterations of morphological and biochemical characteristics than the narrowleaved species with C 4 type photosynthesis.