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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
19/03/1992 |
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Data da última atualização: |
19/03/1992 |
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Autoria: |
RAGHAVAN, V. |
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Afiliação: |
University of Malaya - Department of Botany. |
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Título: |
Nutrition, Growth and Morphogenesis of Plant Embryos. |
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Ano de publicação: |
1966 |
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Fonte/Imprenta: |
Biol. Rev., v.41, p.1-58, 1966. |
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Idioma: |
Inglês |
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Conteúdo: |
1. This article is devoted to an analysis of the relation between embryogenesis in plants and the physical and chemical factors of the environment in which it occurs. Embryological studies have not been carried sufficiently far to provide us with a picture of embryonic growth in cellular and chemical terms. A few cytochemical studies on eggs of ferns, and on eggs and embryos of angiosperms have indicated an unusual DNA metabolism in them. From the review of the work on the distribution of oxidative enzymes in developing embryos, there are indications of a relationship between enzyme synthesis and morphogenesis. 2. The composition of the endosperm of a few species has been considered in its relation to the nutrition of developing embryos. The view is taken that complex metabolites contained in the endosperm control the growth of embryos in vivo. 3. Culture of plant embryos in relation to their nutritional requirements has been considered under two headings: nutrition of differentiated and mature embryos, and nutrition of proembryos. It appears that while differentiated and mature embryos can be grown in simple nutrient media, proembryos require for growth in vitro complex supplements such as amino acids, natural endosperm extracts and growth substances. 6. Some observations from cultural studies which indicate a relationship between progressive embryogenesis and the activation of biochemical mechanisms are examined. |
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Categoria do assunto: |
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Marc: |
LEADER 01749naa a2200121 a 4500
001 1646562
005 1992-03-19
008 1966 bl --- 0-- u #d
100 1 $aRAGHAVAN, V.
245 $aNutrition, Growth and Morphogenesis of Plant Embryos.
260 $c1966
520 $a1. This article is devoted to an analysis of the relation between embryogenesis in plants and the physical and chemical factors of the environment in which it occurs. Embryological studies have not been carried sufficiently far to provide us with a picture of embryonic growth in cellular and chemical terms. A few cytochemical studies on eggs of ferns, and on eggs and embryos of angiosperms have indicated an unusual DNA metabolism in them. From the review of the work on the distribution of oxidative enzymes in developing embryos, there are indications of a relationship between enzyme synthesis and morphogenesis. 2. The composition of the endosperm of a few species has been considered in its relation to the nutrition of developing embryos. The view is taken that complex metabolites contained in the endosperm control the growth of embryos in vivo. 3. Culture of plant embryos in relation to their nutritional requirements has been considered under two headings: nutrition of differentiated and mature embryos, and nutrition of proembryos. It appears that while differentiated and mature embryos can be grown in simple nutrient media, proembryos require for growth in vitro complex supplements such as amino acids, natural endosperm extracts and growth substances. 6. Some observations from cultural studies which indicate a relationship between progressive embryogenesis and the activation of biochemical mechanisms are examined.
773 $tBiol. Rev.$gv.41, p.1-58, 1966.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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