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以乙烯敏感型切花蜡花为试材,用10、20mg/L纳米银(nano-silver,NS)溶液及0.5mmol/L硫代硫酸银(silver thiosulfate,STS)溶液分别预处理蜡花切花茎基端24h,以去离子水为对照,随后移至去离子水中瓶插,并用5μL/L外源乙烯处理24h,观测瓶插期间的观赏品质、瓶插寿命和花朵脱落率。结果表明:乙烯处理可加快蜡花切花失水凋萎及花朵脱落,并抑制花朵开放,而NS和STS预处理可显著减轻乙烯处理对蜡花切花的不利影响,其中以0.5mmol/L STS处理效果最佳,10mg/L NS处理次之;另外,采用电感耦合等离子体-原子发射光谱(ICP-AES)法测定10mg/L NS和0.5mmol/L STS溶液预处理后银(Ag)在蜡花切花体内分布发现,2种处理的茎末端、茎上部、花瓣和叶片均有Ag分布,但NS处理的茎末端Ag含量明显高于STS处理,而前者花瓣Ag含量则显著低于后者。
The ethylene-sensitive cut flowers were used as test materials, and the stems of cut flowers were pretreated with 10, 20 mg / L nano-silver (NS) solution and 0.5 mmol / L silver thiosulfate The basal end 24h, with deionized water as a control, then moved to deionized water vial, and 5μL / L exogenous ethylene treatment 24h, observe bottle vase ornamental quality, vase life and flower shedding rate. The results showed that ethylene treatment accelerated the wilting and flower loss of flowers, and inhibited flower opening. However, the pretreatment with NS and STS significantly reduced the adverse effects of ethylene treatment on the cut flowers, and the treatment with 0.5 mmol / L STS The best treatment was 10 mg / L NS. In addition, silver (Ag) was pretreated with 10 mg / L NS and 0.5 mmol / L STS in wax The results showed that there was Ag distribution at the end of stem, upper part of the stem, petals and leaves of the two treatments. However, Ag content of stems treated with NS was significantly higher than that of STS treatment, while Ag content of the former petals was significantly lower than the latter.