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A COMPARISON OF FLORAL DEVELOPMENT IN WILD TYPE AND A HOMEOTIC SEPALOID PETAL MUTANT OF CLARKIA TEMBLORIENSIS (ONAGRACEAE)
Author(s) -
SmithHuerta Nancy L.
Publication year - 1992
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.1537-2197.1992.tb13753.x
Subject(s) - petal , sepal , biology , botany , anatomy , pollen , stamen
The mature wild type petals of Clarkia tembloriensis consist of a long slender claw and an expanded deltoid‐shaped limb. They are pink, with a maroon spot at the base of the limb. Their surface texture is smooth. A variant of petal form, crinkled petal , occurs commonly in several natural populations of C. tembloriensis. The mature crinkled petals are elongated, greenish pink, and possess trichomes. They resemble the mature sepals of C. tembloriensis in general shape, color, and surface texture. Organ initiation and subsequent patterns of development of wild type petals, wild type sepals, and crinkled petals were examined and compared using scanning electron microscopy and allometric growth analysis. Crinkled petals are similar to wild type petals in time and position of primordia initiation, and in size and shape at inception. Crinkled petals are similar to wild type sepals in pattern of allometric growth. The crinkled petal mutant fits the broad definition of a homeotic mutant in that the petal has assumed characteristics of the sepal.