Recalcitrant Seeds
Mostrando 13-20 de 20 artigos, teses e dissertações.
-
13. Desiccation tolerance and sensitivity in Medicago truncatula and Inga vera seeds
Orthodox seeds acquire desiccation tolerance (DT) during their development which enables them to pass through the phase of maturation drying by the end of their development and enter a state of quiescence. After harvesting, these seeds can be dried further and stored for the long-term without significant loss of viability. On the other hand, there are many s
Publicado em: 2006
-
14. Conservation of Euterpe oleracea seeds / Conservação de sementes de açaí (Euterpe oleracea Mart.)
Seeds of Euterpe oleracea Mart. are considered recalcitrant and demand enlargement of the knowledge about the factors that interfere in its conservation. The present work aimed to verify the effects on seed moisture content and of the atmosphere temperature in the maintenance of seed quality. Seeds of cultivar BRS Pará, with moisture content of 43,4%, 37,4%
Publicado em: 2006
-
15. ConservaÃÃo de sementes de espÃcieis dos gÃneros Nectandra, Ocotea e Persea (Lauraceae) / Conservation of species seeds of Nectandra, Ocotea and Persea generos (LAURACEAE).
This study aimed to investigate the seed storage behavior, the effect of the fruits coloration and storage (5C, 60%RH) on seed viability, and to adapt the X ray method to verify alterations in the internal morfology and their effects on the seed quality of the species of Lauraceae which grow in the south of Minas Gerais State, Brazil. Seeds of Nectan
Publicado em: 2006
-
16. Harvesting and storage of gabiroba (Campomanesia adamantium CAMB.) seeds and their implication in the germination / Colheita e Armazenamento de Sementes de Gabiroba (Campomanesia adamantium Camb.) e Implicações na Germinação
Gabiroba, Campomanesia adamantium, is a Brazilian Cerrado species with high frequency in the inferior extracts (diameter <5cm). It produces a fruit largely appreciated and with commercial potential of exploration. It is not cultivated and because of that is threatened by the extractive exploitation what makes necessary the acquisition of knowledge concerning
Publicado em: 2006
-
17. Aspectos fisiolÃgicos e anatÃmicos das sementes e do desenvolvimento inicial de Eugenia pyriformis Camb. / Physiological and anatomical aspects of seeds and initial development of Eugenia pyriformis Camb. seedlings. 2006. 225 p. Thesis (Doctor degree in Agronomy/Plant Physiology) - Universidade Federal de Lavras, Lavras, MG. *
Sementes recalcitrantes perdem a viabilidade quando sÃo dessecadas. Existem vÃrios mecanismos de tolerÃncia à dessecaÃÃo que foram revisados neste trabalho sob uma abordagem ecolÃgica, fisiolÃgica e evolutiva. As sementes de Eugenia pyriformis Camb. (Myrtaceae) sÃo recalcitrantes e foram estudadas quanto ao desempenho germinativo e a alteraÃÃes ul
Publicado em: 2006
-
18. Purification and in vitro chaperone activity of a class I small heat-shock protein abundant in recalcitrant chestnut seeds.
A 20-kD protein has been purified from cotyledons of recalcitrant (desiccation-sensitive) chestnut (Castanea sativa) seeds, where it accumulates at levels comparable to those of major seed storage proteins. This protein, termed Cs smHSP 1, forms homododecameric complexes under nondenaturing conditions and appears to be homologous to cytosolic class I small h
-
19. Rate of Dehydration and Cumulative Desiccation Stress Interacted to Modulate Desiccation Tolerance of Recalcitrant Cocoa and Ginkgo Embryonic Tissues1
Rate of dehydration greatly affects desiccation tolerance of recalcitrant seeds. This effect is presumably related to two different stress vectors: direct mechanical or physical stress because of the loss of water and physicochemical damage of tissues as a result of metabolic alterations during drying. The present study proposed a new theoretic approach to r
American Society of Plant Physiologists.
-
20. Dielectric Relaxation of Water and Water-Plasticized Biomolecules in Relation to Cellular Water Organization, Cytoplasmic Viscosity, and Desiccation Tolerance in Recalcitrant Seed Tissues1
To understand the relationship between the organization of cellular water, molecular interactions, and desiccation tolerance, dielectric behaviors of water and water-plasticized biomolecules in red oak (Quercus rubra) seeds were studied during dehydration. The thermally stimulated current study showed three dielectric dispersions: (a) the relaxation of loose
American Society of Plant Physiologists.