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51.
基于香椿因采摘期短、季节性强和极易腐烂变质等问题,以二茬香椿为原料,采用不同浓度的葡萄柚籽提取物(GSE)和聚乙烯(PE)包装对其进行保鲜处理,测定其贮藏期间的菌落总数、霉菌酵母菌数及细菌和真菌的生物多样性.结果表明,0.5%GSE结合PE保鲜膜处理组能够有效地抑制菌落总数以及霉菌酵母菌数的增长;优势细菌门为蓝菌门(Cyanobacteria)和变形菌门(Proteobacteria),优势细菌属为产碱菌属(Alcaligenes)和红色杆菌属(Rubrobacter);优势真菌门为子囊菌门(Ascomycota)和担子菌门(Basidiomycota),优势真菌属为短梗霉属(Aureobasidium)和斯宾塞马丁氏孢菌属(Spencermartinsia).香农指数和主成分分析结果表明,0.5%GSE结合PE保鲜膜处理组的细菌和真菌生物多样性最低,微生物群落更加稳定. 相似文献
52.
Ron Porat Victor Vinokur Batia Weiss Lea Cohen Avinoam Daus Eliezer E. Goldschmidt Samir Droby 《European journal of plant pathology / European Foundation for Plant Pathology》2003,109(9):901-907
-Aminobutyric acid (BABA), an inducer of pathogen resistance in plants, induced disease resistance in reproductive parts of the plant, such as grapefruit peel tissue. Application of BABA to specific wound sites on the fruit peel surface induced resistance to Penicillium digitatum, the main postharvest pathogen of citrus fruit, in a concentration-dependent manner, being most effective at 20mM, and rather less effective at either higher or lower concentrations. The effect of BABA in inducing resistance to P. digitatum in the fruit peel surface was local and limited to the vicinity (within 1–2cm) of the BABA-treated site. In addition to inducing pathogen resistance, increasing concentrations of BABA (from 1 to 100mM) also exhibited direct antifungal activity and inhibited P. digitatum spore germination and germ tube elongation in vitro. The induction of resistance to P. digitatum by BABA was accompanied by the activation of various pathogen defense responses in grapefruit peel tissue, including activation of chitinase gene expression and protein accumulation after 48h, and an increase in phenylalanine ammonia lyase (PAL) activity after 72h. 相似文献
53.
引进美国葡萄柚果实营养分析 总被引:2,自引:0,他引:2
以云南省普文县生长的9个葡萄柚品种的果实为试材,主要对果实的性状和综合营养品质进行分析,结果表明,不同品种的单果重、可食率、总糖、含酸量、可溶性固形物、Vc和含汁量的差异明显,其变幅依次为301.30~366.42g、62.58%~71.11%、3.26%~5.34%、0.92%~1.32%、6.42%~8.86%、20.84~26.71mg/100g、53.4%~70.3%,其他性状差异不明显。综合营养品质较好的品种是里约红,哈路比、帕利斯、里德马叙,营养品质较差的是矮化。 相似文献