study on some ecological aspects of cutleaf groundcherry (physalis angulata l.) seed germination and dormancy
نویسندگان
چکیده
a better understanding of the factors influencing the germination of weed seeds could facilitate the development of more effective cultural weed management practices. the aim of this research was to determine the effects of environmental factors on seed germination of cutleaf groundcherry (physalis angulata l.). results showed that application of gibberellic acid (ga3) was effective treatment for seeds primary dormancy breaking. physalis angulata seed had identical germination in either light/dark or continuous dark regimes, indicating this weed species is non-photoblastic. however, the maximum germination percentages and germination rates were observed at warmer alternating temperatures. the ranges of response to the constant temperature for germination were widened during afterripening periods. based on the 2-piece segmented model, the base, the optimum and maximum temperatures for germination of p. angulata were estimated to be 8.06, 35.83 and 42.30 ˚c, respectively. the response thresholds of p. angulata to inhibit 50% of maximum germination for salinity and osmotic potential were 59.25 mm and -0.29 mpa, respectively. according to the weibull hydrotime model, hydrotime constant and base water potential to initiate germination were obtained equal to 26 mpa h and -1.45 mpa, respectively.
منابع مشابه
Seed dormancy and germination.
Seed dormancy and germination are complex adaptive traits of higher plants that are influenced by a large number of genes and environmental factors. Studies of genetics and physiology have shown the important roles of the plant hormones abscisic acid and gibberellin in the regulation of dormancy and germination. More recently, the use of quantitative genetics and mutant approaches has allowed t...
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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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This research was carried out with the aim of dormancy breakage and seed germination improvement in mature and immature seeds of T. rubra subsp. caucasica form angulata. The seeds were collected from middle altitude (500 a.s.l.) forests of Chamestan, north of Iran. Mature and immature seeds with pericarp were treated as 1) cold stratification (without pretreatment), 2) imbibed with NaOH (30%)+c...
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...
متن کاملA study on genetic aspects of seed dormancy
Changes in seed dormancy were selected during the domestication of crop plants from wild-plant species, because some features of dormancy that provide ecological advantages presented agronomic disadvantages within a farmed system. Seed dormancy varies widely among seed batches, even for seeds of the same genotype, indicating large environmental influences. For genetic studies, it is essential t...
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عنوان ژورنال:
حفاظت گیاهانجلد ۲۸، شماره ۳، صفحات ۴۱۶-۰
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