Latencia en semillas de Stylosanthes hamata (Leguminosae) y su relación con la morfología de la cubierta seminal

 

সংরক্ষণ করুন:
গ্রন্থ-পঞ্জীর বিবরন
লেখক: Castillo, Rosana, Guenni, Orlando
বিন্যাস: artículo original
বর্তমান অবস্থা:Versión publicada
প্রকাশনার তারিখ:2001
বিবরন:The seed of Stylosanthes hamata is characterized by it´s a high level of dormancy, which is imposed by seed-coat impermeability to water entry (harseededness or hard-seed condition). The level of hardseededness between upper and lower articulations of seven diploid and five tetraploid accessions was studied under tropical conditions. Germination tests on naked seeds (relative humidity: 55-65%, constant temperature: 27-30º C, photoperiod: 12/12 hr) showed that hard-seed percentage was, in most cases, over 85% independent of ploidy level and seed position within the fruit. Histochemical analysis indicated that hardseededness in this species was associated with a completely sealed microphile and hilum. This feature was also associated to: a) an epidermis consisting of a palisade-like layer of macrosclereids, b) a like-line at the outermost region of these cells and c) a high concentration of hydrophobic compounds located all across the seed-coat.
দেশ:Portal de Revistas UCR
প্রতিষ্ঠান:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
ভাষা:Español
OAI Identifier:oai:portal.ucr.ac.cr:article/16929
অনলাইন ব্যবহার করুন:https://revistas.ucr.ac.cr/index.php/rbt/article/view/16929
মুখ্য শব্দ:stylosanthes hamata
hard-seed
hardseededness
dormancy
morpho-anatomical features
germination
seed-coat