Seed dormancy concepts in orchids: <i>Dendrobium cruentum</i> as a model species
نویسندگان
چکیده
Abstract Generally, orchids produce dust-like seeds in which endosperm reduction and embryo undifferentiation represent a derived state shared with species about 11 other plant families. Orchid are proposed to have special kind of morphological or morphophysiological dormancy. We test this proposition, overcoming several design limitations earlier studies, specifically that the vitro germination method for orchid uses pro-oxidants disinfection incorporates nitrate medium; both ‘treatments’ might contribute dormancy breaking, potentially confounding judgement on depth nature dormant state. Seeds tropical Dendrobium cruentum Rchb. f., were sown , nutrient medium, ex plain agar omitting prior sodium hypochlorite. previously stored fresh incubated under combinations conditions, light treatments, constant alternating temperatures concentration. D. very small but large occupies most seed. Over range temperature germinated spherical protocorm stage just as well . Neither nor prerequisites germination. The ability seed germinate absence environmental chemical stimuli suggests mature can be non-dormant. Our results support proposition neither all DUST fit class seeds. Finally, embryo/seed volume determinations may prove valuable studies evolution ecology embryo:seed ratios angiosperm species.
منابع مشابه
A STUDY ON SEED DORMANCY AND GERMINATION IN TEN SPECIES OF GRASS WEEDS
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متن کاملSeed Germination and Dormancy.
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متن کاملSeed Germination and Dormancy
Seeds are a vital component of the world’s diet. Cereal grains alone, which comprise -90% of all cultivated seeds, contribute up to half of the global per capita energy intake. Not surprisingly then, seed biology is one of the most extensively researched areas in plant physiology. Even in relation to the topics reviewed here, a casual perusal of the Agricola database reveals that well over 5000...
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ژورنال
عنوان ژورنال: Seed Science Research
سال: 2022
ISSN: ['0960-2585', '1475-2735']
DOI: https://doi.org/10.1017/s0960258522000198