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Chilling syndrome in light‐exposed maize leaves and its easing by low doses of DCMU
Author(s) -
Mustárdy L. A.,
SzRózsa Zsuzsa,
FaludiDániel Ágnes
Publication year - 1984
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.1399-3054.1984.tb04930.x
Subject(s) - dcmu , photosynthesis , wilting , thylakoid , electron transport chain , zea mays , photosystem ii , swelling , chemistry , botany , horticulture , biology , chloroplast , agronomy , materials science , biochemistry , gene , composite material
When maize plants ( Zea mays L. line ps‐lye) were subjected to chilling (at 8 ± 2°C, 80% relative humidity for 24 h under illumination by 80 W m 2 between 400–700 nm), the leaves were wilted and photosynthetic membranes were permanently damaged. This was shown by the swelling of grana thylakoids and a deerease in the charging capacity of the electron transport chain. Water loss and photosynthetic dysfunction were connected in the process of a chilling‐induced increase of stomatal aperture. Chilling injury could be eased to a considerable extent by a mild treatment with DCMU preventing stomatal opening, wilting, and the irreversible loss of CO 2 fixation capacity.