Journal ArticleDOI
A mutation causing proline requirement in Zea mays
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TLDR
This is probably the first case of a strict genetic requirement for an amino acid to be reported in Zea mays, and the possible reasons for the difficulties encountered in isolating obligate auxotrophs in higher plants are briefly reviewed.Abstract:
A conditional seedling lethal, monogenic recessive, endosperm mutant is described. Phenotypic can be accomplished when embryos are cultured in vitro on media supplemented with proline. The efficiency of the repair is proportional to the concentration of proline in the medium. Normal growth is resumed at a dose of 160 mg/l. All the data collected are most easily interpreted by assuming that the mutant, symbolized pro has a genetic block in the biosynthetic route leading to proline.This is probably the first case of a strict genetic requirement for an amino acid to be reported in Zea mays. The possible reasons for the difficulties encountered in isolating obligate auxotrophs in higher plants are briefly reviewed.read more
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Metabolic Responses of Mesophytes to Plant Water Deficits
Andrew D. Hanson,William D. Hitz +1 more
TL;DR: The term adaptation refers to heritable modifications in structures or functions that increase the probability of an organism surviving and reproducing in a particular environment that can be constitutive (always expressed) or stress-induced.
Journal ArticleDOI
Role of proline in cell wall synthesis and plant development and its implications in plant ontogeny.
Polavarapu B. Kavi Kishor,P. Hima Kumari,M. S. L. Sunita,Nese Sreenivasulu,Nese Sreenivasulu +4 more
TL;DR: The role of extensins, arabinogalactan proteins and hydroxyproline- and proline-rich proteins as important components of cell wall proteins that play pivotal roles in cell wall signal transduction cascades, plant development and stress tolerance is discussed in this review.
Journal ArticleDOI
Embryo-lethal mutants of Arabidopsis thaliana. A model system for genetic analysis of plant embryo development.
David W. Meinke,Ian M. Sussex +1 more
TL;DR: Normal development is described in Arabidopsis thaliana, strain “Columbia,” and a method of classifying embryo-lethal mutants as cellular, nutritional, or developmental lethals is presented, and the potential application of these mutants to the study of normal embryo development is discussed.
Journal ArticleDOI
An embryo-lethal mutant of Arabidopsis thaliana is a biotin auxotroph
TL;DR: The bio1 mutant of Arabidopsis described in this report clearly demonstrates that some auxotrophs in higher plants are eliminated through embryonic lethality, and is described as an embryo-lethal mutant that can be rescued by the addition of biotin to arrested embryos cultured in vitro and to mutant plants grown in soil.
References
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Copper enzymes in isolated chloroplasts. polyphenoloxidase in beta vulgaris
TL;DR: Evidence that a copper enzyme, polyphenoloxidase (otherwise known as tyrosinase or catecholase), is localized in the chloroplasts of spinach beet (chard), Beta vu?garis is presented.
Journal ArticleDOI
In vitro Production of Embryos from Anthers of Datura
Sipra Guha,Satish C. Maheshwari +1 more
TL;DR: Observations of natural phenomena such as adventive embryony and production of plantlets from the leaf margins of Bryophyllum support the view that although cells may differentiate and appear to behave differently, their genetic potentialities remain the same.
Journal ArticleDOI
[Chlorophyll lethals & submicroscopic morphological changes in plastids].
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