Water relations in seed biology
نویسندگان
چکیده
منابع مشابه
A water relations analysis of seed germination rates.
Seed germination culminates in the initiation of embryo growth and the resumption of water uptake after imbibition. Previous applications of cell growth models to describe seed germination have focused on the inhibition of radicle growth rates at reduced water potential (Psi). An alternative approach is presented, based upon the timing of radicle emergence, to characterize the relationship of s...
متن کاملWater Relations of Seed Development and Germination in Muskmelon (Cucumis melo L.) : V. Water Relations of Imbibition and Germination.
The initiation of radicle growth during seed germination may be driven by solute accumulation and increased turgor pressure, by cell wall relaxation, or by weakening of tissues surrounding the embryo. To investigate these possibilities, imbibition kinetics, water contents, and water (Psi) and solute (psi(s)) potentials of intact muskmelon (Cucumis melo L.) seeds, decoated seeds (testa removed, ...
متن کاملWater Relations of Seed Development and Germination in Muskmelon (Cucumis melo L.) : IV. Characteristics of the Perisperm during Seed Development.
We previously reported that an apparent water potential disequilibrium is maintained late in muskmelon (Cucumis melo L.) seed development between the embryo and the surrounding fruit tissue (mesocarp). To further investigate the basis of this phenomenon, the permeability characteristics of the tissues surrounding muskmelon embryos (the mucilaginous endocarp, the testa, a 2- to 4-cell-layered pe...
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Interest in seed propagation of drumstick tree (Moringa oleifera) has created a need for information about the water relationships of its seeds. Thus, we studied the imbibition and desiccation kinetics and adsorption/ desorption isotherms of drumstick tree seeds. Seeds absorbed water readily when imbibed at 23oC. After 17 h of exposure to an atmosphere of 100% relative humidity (RH), seed moist...
متن کاملBiological Water or Rather Water in Biology?
There has been a lot of discussion about biological water recently. Books 1-2 and reviews 3-5 were written in the past years and a special issue of the Journal of Chemical Physics was dedicated to the topic in 2014. 6 Interestingly, papers on biological water are mostly confined to chemistry and physics journals, being remarkably rare in biological or biochemical literature. So, what is actuall...
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ژورنال
عنوان ژورنال: Scientia Agricola
سال: 1998
ISSN: 0103-9016
DOI: 10.1590/s0103-90161998000500018