Desiccation Tolerance
Mostrando 1-12 de 83 artigos, teses e dissertações.
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1. Secagem na viabilidade e desenvolvimento embrionário de sementes de Ilex paraguariensis
Resumo A germinação de erva-mate tem sido apontada como baixa, irregular e lenta, com diferentes graus de dormência, tornando a produção de mudas um grande desafio. Estudos destinados a esclarecer os principais mecanismos de dormência presentes em sementes de erva-mate são de grande importância, porém, escassos. Diante disso, objetivou-se avaliar os
Ciênc. Florest.. Publicado em: 02/12/2019
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2. In situ DNA fragmentation during the re-establishment of desiccation tolerance in germinated seeds of Cedrela fissilis Vell.
Resumo: A desidratação é um procedimento necessário antes de expor as sementes ao armazenamento a longo prazo, mas isso está associado à lesão ligada ao metabolismo mediada por lesão celular. A fim de avaliar as alterações celulares durante o restabelecimento da tolerância à dessecação (TD) em sementes germinadas de C. fissilis e sua relação
J. Seed Sci.. Publicado em: 01/07/2019
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3. Physiological and biochemical changes during desiccation tolerance loss in millet (Pennisetum glaucum L.) seeds
ABSTRACT. The aim of this study was to evaluate the physiological and biochemical changes related to desiccation tolerance loss in millet seeds. The studied points of the germination process were determined according to the seed imbibition curve of the millet hybrid ADRF6010: control (0h), 3h of imbibition, 1 and 3 mm radicle. The seeds were dried on silica
Acta Sci., Agron.. Publicado em: 28/03/2019
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4. Distribution, ecology, and reproduction of bryophytes in a humid enclave in the semiarid region of northeastern Brazil
ABSTRACT The ready availability of water resources distinguishes the humid forest of Chapada do Araripe, Ceará State, Brazil, from the semiarid vegetation around it. The regional climate demonstrates a marked seasonality of rainfall that affects the ecological strategies of the species found there. We studied the bryophytes of the humid forest of Chapada do
Acta Bot. Bras.. Publicado em: 2018-06
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5. ABA regulation of post-germination desiccation tolerance in wheat cultivars contrasting in drought tolerance
ABSTRACT Post-germination desiccation tolerance (DT) was studied in two wheat cultivars. Effect of pretreatment of abscisic acid (ABA)/ osmotic/ salt/ heat stress was also studied. One day (d)-old seedlings of wheat cultivars PBW 644 (drought tolerant) and PBW 343 (drought susceptible) were exposed to ABA/stress treatment for next 1 d, desiccated for 4 d and
An. Acad. Bras. Ciênc.. Publicado em: 2018-04
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6. Drying and reduction in sensitivity to desiccation of seeds of Alibertia edulis: the influence of fruit ripening stage
ABSTRACT The intense environmental degradation in tropical regions suitable for agriculture has decreased native forest populations of plants with important fruits and medicinal properties. Alibertia edulis is a native tree from the Brazilian Cerrado. Knowledge about the effects of drying and storage on the physiological behavior of its seeds may aid in its
An. Acad. Bras. Ciênc.. Publicado em: 2018-04
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7. Multiple genes contribute to anhydrobiosis (tolerance to extreme desiccation) in the nematode Panagrolaimus superbus
Abstract The molecular basis of anhydrobiosis, the state of suspended animation entered by some species during extreme desiccation, is still poorly understood despite a number of transcriptome and proteome studies. We therefore conducted functional screening by RNA interference (RNAi) for genes involved in anhydrobiosis in the holo-anhydrobiotic nematode Pan
Genet. Mol. Biol.. Publicado em: 06/11/2017
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8. Bryophyte communities of restingas in Northeastern Brazil and their similarity to those of other restingas in the country
ABSTRACT Restingas are a coastal component of the Atlantic Forest. They experience high temperatures and possess soils with a low capacity to retain water, low nutrient content and high salt concentrations. Studies on bryophytes of restingas have been mostly conducted in Southeastern Brazil, and so we aimed to characterize the bryophyte flora of seven areas
Acta Bot. Bras.. Publicado em: 25/08/2016
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9. Physiological and biochemical changes during the loss of desiccation tolerance in germinating Adenanthera pavonina L. seeds
RESUMO Nós investigamos a perda da tolerância à dessecação (TD) em sementes deAdenanthera pavonina durante a germinação. Sementes submetidas à embebição por 0, 24, 36, 48, 60 e 81 h foram secas até à umidade inicial (13%), reidratadas e avaliadas quanto à sobrevivência (retomada do crescimento e formação de plântulas normais) e à integridad
An. Acad. Bras. Ciênc.. Publicado em: 27/11/2015
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10. Re-induction of desiccation tolerance after germination of Cedrela fissilis Vell. seeds
O objetivo deste trabalho foi caracterizar a re-indução da tolerância à dessecação em sementes germinadas de Cedrela fissilis, utilizando polietileno glicol (PEG 8000). As mudanças celulares foram investigadas pelas avaliações citológicas (viabilidade celular e microscopia eletrônica de transmissão), bem como a integridade do DNA durante a perda
An. Acad. Bras. Ciênc.. Publicado em: 15/08/2014
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11. Desiccation tolerance in seeds of Annona emarginata (Schldtl.) H. Rainer and action of plant growth regulators on germination
Annona emarginata (Schldtl.) H. Rainer ("araticum-de-terra-fria") is used as a rootstock for several species of Annonaceae. It is suggested that these seeds should be sown immediately after extraction and, therefore, they could be intolerant to desiccation. There are several mechanisms involved with desiccation tolerance. Soluble sugars, for example, can acc
Braz. J. Plant Physiol.. Publicado em: 2012-12
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12. Water potential and viability of seeds of Eugenia (Myrtaceae), a tropical tree species, based upon different levels of drying
The aim of the present work was to study the water potential and viability of Eugenia based upon different levels of drying. The seeds showed high water content at shedding and were sensitive to desiccation; however, the level of this sensitivity (water content) varied among the species. Five target drying levels were defined according to the critical levels
Brazilian Archives of Biology and Technology. Publicado em: 2012-08