Showing papers on "Plant morphology published in 1986"
TL;DR: The progeny were found to possess recombinations of various traits associated with reduced photorespiration, so that no correlation existed among O( 2) inhibition of apparent photosynthesis, CO(2) compensation concentration, and leaf anatomical traits.
Abstract: Species in the Laxa group of Panicum have C(3) or C(3)/C(4) photosynthesis based on leaf anatomical and CO(2) exchange characteristics. Hybrids were previously made between C(3)/C(4) and C(3) species in this group (RH Brown et al. 1985 Plant Physiol 77: 653-658). In this paper, CO(2) exchange, morphological, and leaf anatomical characteristics of F(2) or F(5) progeny from colchicine-induced amphiploids of C(3)/C(4) x C(3) hybrids (Panicum milioides Nees ex Trin. [C(3)/C(4)] x Panicum laxum Mez [C(3)] and Panicum spathellosum Doell [C(3)/C(4)] x Panicum boliviense Hack. [C(3)]) were studied.There were no differences found in morphology or physiology between the amphiploids and the F(1) hybrids from which they were produced. In the segregating progeny, CO(2) compensation concentration and photorespiration values typical of C(3), but not of C(3)/C(4) plants, were recovered. Progeny were found from both crosses which possessed O(2) inhibition of apparent photosynthesis typical of the parents, and in the case of the P. milioides x P. laxum cross, leaf anatomy and overall plant morphology typical of the parents were observed in some progeny. The progeny were found to possess recombinations of various traits associated with reduced photorespiration, so that no correlation existed among O(2) inhibition of apparent photosynthesis, CO(2) compensation concentration, and leaf anatomical traits. One plant was especially noteworthy in possessing leaf anatomy typical of C(3)/C(4) plants, but with CO(2) exchange characteristics of C(3) plants.
21 citations
TL;DR: Seeds from two morphologically different groups in an Erophila verna dune population were used to analyse and quantify flexibility and plasticity of growth and reproductive characteristics and a strong correlation between plant morphology and individual seed weight was shown in parents and progeny.
Abstract: Seeds from two morphologically different groups in an Erophila verna dune population were used in a growth experiment to analyse and quantify flexibility and plasticity of growth and reproductive characteristics. A strong correlation between plant morphology and individual seed weight was shown in parents and progeny. Seeds of plants with narrow leaves were twice as heavy (H-plants) as those from plants with broad leaves (L-plants) Families of H-plants allocated ca. 10% more dry matter to the roots. These characters were fixed, presumably due to selfing. Plants of both types are characterized by a graded control function between the vegetative and the reproductive phase. Most of the families showed a single switch from vegetative to reproductive growth, two families showed even two switch periods. Between-family differentiation is interpreted as a result of multiniche selection in populations of Erophila verna. Within-family variation is disadvantageous due to low fecundity.
6 citations