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Seed Germination Traits of Loquat (Eriobotrya japonica Lindl.) as Affected by Various Pre-Sowing Treatments (Cutting of Cotyledons, Removal of Perisperm, Moist Chilling and/or Exogenous Application of Gibberellin)

引用

Phyton-International Journal of Experimental Botany 2020年第3期89卷 645-656页

作者： thiresia-teresa tzatzani Evangelia Basdeki Evangelia-Vasiliki Ladikou Marios-Ioannis NSotiras Georgios Panagiotakis Sryridon Lionakis Ioannis E.Papadakis Laboratory of Subtropical Plants and Tissue Culture Institute of Olive TreeSubtropical Plants and ViticultureHellenic Agricultural Organization-DEMETERChania73134Greece Laboratory of Genetics Department of BiotechnologyAgricultural University of Athens(Member of the European University for Smart Urban Coastal Sustainability-EU-CONEXUS)Athens11855Greece Laboratory of Pomology Department of Crop ScienceAgricultural University of Athens(Member of the European University for Smart Urban Coastal Sustainability-EU-CONEXUS)Athens11855Greece Laboratory of Pomology School of Agricultural SciencesHellenic Mediterranean UniversityHeraklion71410Greece

The purpose of this study was to investigate the effects of various presowing treatments on the germinability(final germination percentage)and germination rate of loquat seeds in order to increase seedling production in nurseries(applied research)as well as provide answers for important physiological issues related to loquat seeds and their seed coat(basic research).Three experiments were carried out with various pre-sowing *** treatments included full or partial removal of seed coat(perisperm),partial cutting of cotyledons as well as moist chilling at 5℃ for 13 days and/or soaking the seeds in water or 250 ppm gibberellic acid(GA_(3))solution for 24 *** to the results,cotyledons excision resulted in delayed germination,regardless of the presence or absence of the seed coat in comparison with the decoated seeds that demonstrated the highest germination rate amongst *** addition,even the partial excision of seed coats affected positively both the germinability and the germination rate,compared to the control-intact ***,control-intact seeds had a higher germination percentage when exposed to moist chilling independently of the application or not of gibberellin;while the combination of gibberellin application and moist chilling improved both the percentage and the rate of germination of decoated *** conclusion,the role of perisperm(seed coat)in the germination procedure of loquat seeds seems to be important,indicating the existence of seed coat-imposed dormancy on loquat ***,the existence of a mild endogenous embryo-dormancy on loquat is also discussed.

关键词： Cotyledon gibberellin seed coat seed testa Eriobotrya japonica plant propagation perisperm sexual propagation seedling dormancy

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