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THE PHOTOINHIBITION OF GROWTH IN ETIOLATED STEM SEGMENTS. I. GROWTH CAUSED BY SUGARS IN PISUM
Author(s) -
Bertsch Walter F.,
Hillman William S.
Publication year - 1961
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1961.tb11676.x
Subject(s) - etiolation , biology , photoinhibition , xylose , arabinose , fructose , botany , sucrose , sugar , biochemistry , photosynthesis , fermentation , photosystem ii , enzyme
B ertsch , W alter F., and W illiam S. H illman . (Yale U., New Haven, Conn.) The photoinhibition of growth in etiolated stem segments. I. Growth caused by sugars in Pisum. Amer. Jour. Bot. 48(6): 504–511. Illus. 1961.—Etiolated pea stem segments were used to study the red, far‐red reversible photoinhibition of stem growth. The growth of immature, apical tissue was insensitive to light after excision from the seedling, unless a growth‐promoting sugar (sucrose, glucose, fructose) was included in the medium. Red light specifically inhibited the growth caused by the sugars. Growth promotions of the same magnitude caused by indoleacetic acid or gibberellic acid were not reduced by irradiation of the tissue. The effects of various other sugars were tested. Arabinose and galactose, which do not promote growth, did not cause photosensitive growth in the isolated tissue. Mannose and xylose promoted growth at low concentrations, and this small promotion was inhibited by irradiation. Phptoinhibition occurred even at inhibitory concentrations of mannose and xylose. The distinctness of light‐sensitive growth is discussed, and the photoinhibition of a growth process which is limited by availability of sugars is suggested.