This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Bricage, P. Search for Related Content PubMed PubMed Citation Articles by Bricage, P. Agricola Articles by Bricage, P.

Articles

Pigmentation and Soluble Peroxidase Isozyme Patterns of Leaves of Pedilanthus tithymaloides L. variegatus as a Result of Daily Temperature Differences ¹

Laboratoire d'Ecophysiologie Végétale, Département de Biologie Végétale, Faculté des Sciences, Université de Dakar, Sénégal

In a constant environment with a narrow (less than 8°C) daily temperature difference (t), leaves of Pedilanthus tithymaloides L. variegatus usually appeared green. After at least two days of t > 10°C, new leaves had become green-white, and a red pigmentation appeared and increased if high t conditions were maintained. If plants were returned to a narrow t, new green leaves reappeared. Electrophoretic patterns of soluble peroxidase isozymes changed during the color changes. Three groups of electrophoretic bands occurred, and each was related to a characteristic tissue. The development of red color was correlated with the appearance of the group with the fastest electrophoretic mobility and the highest peroxidase activity.

¹ Supported by a grant of the Dakar University Research Committee.