Slow growth rate restricts the development and growth of seedlings due to nutrients deficiency or nutrient imbalance.Exponential fertilization can enhance the internal nutrient reserves in seedlings at the nursery-sta...Slow growth rate restricts the development and growth of seedlings due to nutrients deficiency or nutrient imbalance.Exponential fertilization can enhance the internal nutrient reserves in seedlings at the nursery-stage and strengthen their resistance to adverse conditions.In this study,nitrogen requirements for producing Hydrangea macrophylla‘Hanatemari’that robust seedlings,nutrient dynamics,biomass and growth,was examined utilizing exponential fertilization.The potted seedlings were fertilized with urea under exponential regime at rates of 0.5,1.5 and 2.0 g nitrogen/plant(EF1,EF2,and EF3),respectively.In addition,an unfertilized group treated with equal volume of deionized water was used as control.The results showed that seedlings under 1.5 g N/plant(EF2)had the highest plant growth index and total biomass.The nutrient concentrations of different organs varied in different fertilization treatments.Based on the results of current study,it is concluded that 1.5 g N/plant(EF2)is suitable exponential fertilization treatment for the culture of hydrangea seedlings.Our treatments results showed that 2.0 g N/plant is not suitable for seedling culturing,because of serious nutrient toxicity.These findings will help to improve seedling quality and strengthen the production of H.macrophylla for plantation.展开更多
A new kaempferol glycoside,named kaempferol 3-O-[6″-O-β-D-glucopyranosyl-6′′′-O-α-L-rhamnopy ranosyl-2′′′′-O-α-L-rhamnopyranosyl]-β-D-glucopyranoside,was isolated from Hydrangea macrophylla(Thunb.) Seringe...A new kaempferol glycoside,named kaempferol 3-O-[6″-O-β-D-glucopyranosyl-6′′′-O-α-L-rhamnopy ranosyl-2′′′′-O-α-L-rhamnopyranosyl]-β-D-glucopyranoside,was isolated from Hydrangea macrophylla(Thunb.) Seringe.Its structure was establishedby spectroscopic techniques including MS,IR,UV,and 2D NMR.展开更多
为了明确绣球〔Hydrangea macrophylla(Thunb.)Ser.〕品种的耐寒性及筛选耐寒性评价主要指标,对40个绣球品种的低温半致死温度(LT_(50))进行比较和耐寒性分级,在此基础上,对5℃、0℃、-5℃、-10℃、-15℃、-20℃下耐寒品种‘小町’(‘Ko...为了明确绣球〔Hydrangea macrophylla(Thunb.)Ser.〕品种的耐寒性及筛选耐寒性评价主要指标,对40个绣球品种的低温半致死温度(LT_(50))进行比较和耐寒性分级,在此基础上,对5℃、0℃、-5℃、-10℃、-15℃、-20℃下耐寒品种‘小町’(‘Komachi’)、‘佳澄’(‘Kasumi’)、‘无尽夏’(‘Endless Summer’)和不耐寒品种‘甜蜜幻想’(‘Sweet Fantasy’)、‘灵感’(‘Inspiration’)、‘你我的情感’(‘You and Me Feelings’)叶的抗氧化酶活性及丙二醛(MDA)和渗透调节物质含量进行比较,并对这些耐寒指标进行相关性分析和主成分分析。结果表明:供试绣球品种LT 50的波动较大,变化范围为-36.68℃~-1.87℃,其中,‘小町’的LT_(50)最低,‘佳澄’、‘平瓣’(‘Flat’)、‘蒂亚娜’(‘Tijana’)、‘塞尔玛’(‘Selma’)、‘含羞叶’(‘Elbtal’)、‘花手鞠’(‘Stockings’)、‘蓝色多瑙河’(‘Blue Danube’)和‘无尽夏’的LT_(50)均低于-20℃。40个绣球品种的耐寒性被分成不耐寒、较耐寒、耐寒和强耐寒4个等级,分别包含13、18、8和1个品种。6个代表品种的过氧化氢酶(CAT)、多酚氧化酶(PPO)和超氧化物歧化酶活性及MDA、脯氨酸(Pro)、可溶性蛋白质(SP)和可溶性糖含量随温度降低基本呈先升高后降低的变化趋势。相关性分析结果表明PPO活性和Pro含量与LT_(50)呈极显著(P<0.01)负相关。主成分分析结果表明:前4个主成分的累计贡献率为81.212%,说明这4个主成分基本能够反映绣球品种的耐寒性;PPO活性、CAT活性、Pro含量和SP含量的负荷量绝对值分别在第1、第2、第3和第4主成分中最高。研究结果显示:供试绣球品种间的耐寒性差异较大,‘小町’等9个品种的耐寒性较强,能够在冬季温度偏低地区露天栽培,并可作为绣球耐寒品种选育的亲本。PPO活性、CAT活性、Pro含量和SP含量为绣球耐寒性评价的主要指标,尤其是PPO活性和Pro含量。展开更多
基金This research is supported by Science and Technology Research Project of Shanghai Greening and City Appearance Administration in 2019(G192402).
文摘Slow growth rate restricts the development and growth of seedlings due to nutrients deficiency or nutrient imbalance.Exponential fertilization can enhance the internal nutrient reserves in seedlings at the nursery-stage and strengthen their resistance to adverse conditions.In this study,nitrogen requirements for producing Hydrangea macrophylla‘Hanatemari’that robust seedlings,nutrient dynamics,biomass and growth,was examined utilizing exponential fertilization.The potted seedlings were fertilized with urea under exponential regime at rates of 0.5,1.5 and 2.0 g nitrogen/plant(EF1,EF2,and EF3),respectively.In addition,an unfertilized group treated with equal volume of deionized water was used as control.The results showed that seedlings under 1.5 g N/plant(EF2)had the highest plant growth index and total biomass.The nutrient concentrations of different organs varied in different fertilization treatments.Based on the results of current study,it is concluded that 1.5 g N/plant(EF2)is suitable exponential fertilization treatment for the culture of hydrangea seedlings.Our treatments results showed that 2.0 g N/plant is not suitable for seedling culturing,because of serious nutrient toxicity.These findings will help to improve seedling quality and strengthen the production of H.macrophylla for plantation.
文摘为了明确绣球〔Hydrangea macrophylla(Thunb.)Ser.〕品种的耐寒性及筛选耐寒性评价主要指标,对40个绣球品种的低温半致死温度(LT_(50))进行比较和耐寒性分级,在此基础上,对5℃、0℃、-5℃、-10℃、-15℃、-20℃下耐寒品种‘小町’(‘Komachi’)、‘佳澄’(‘Kasumi’)、‘无尽夏’(‘Endless Summer’)和不耐寒品种‘甜蜜幻想’(‘Sweet Fantasy’)、‘灵感’(‘Inspiration’)、‘你我的情感’(‘You and Me Feelings’)叶的抗氧化酶活性及丙二醛(MDA)和渗透调节物质含量进行比较,并对这些耐寒指标进行相关性分析和主成分分析。结果表明:供试绣球品种LT 50的波动较大,变化范围为-36.68℃~-1.87℃,其中,‘小町’的LT_(50)最低,‘佳澄’、‘平瓣’(‘Flat’)、‘蒂亚娜’(‘Tijana’)、‘塞尔玛’(‘Selma’)、‘含羞叶’(‘Elbtal’)、‘花手鞠’(‘Stockings’)、‘蓝色多瑙河’(‘Blue Danube’)和‘无尽夏’的LT_(50)均低于-20℃。40个绣球品种的耐寒性被分成不耐寒、较耐寒、耐寒和强耐寒4个等级,分别包含13、18、8和1个品种。6个代表品种的过氧化氢酶(CAT)、多酚氧化酶(PPO)和超氧化物歧化酶活性及MDA、脯氨酸(Pro)、可溶性蛋白质(SP)和可溶性糖含量随温度降低基本呈先升高后降低的变化趋势。相关性分析结果表明PPO活性和Pro含量与LT_(50)呈极显著(P<0.01)负相关。主成分分析结果表明:前4个主成分的累计贡献率为81.212%,说明这4个主成分基本能够反映绣球品种的耐寒性;PPO活性、CAT活性、Pro含量和SP含量的负荷量绝对值分别在第1、第2、第3和第4主成分中最高。研究结果显示:供试绣球品种间的耐寒性差异较大,‘小町’等9个品种的耐寒性较强,能够在冬季温度偏低地区露天栽培,并可作为绣球耐寒品种选育的亲本。PPO活性、CAT活性、Pro含量和SP含量为绣球耐寒性评价的主要指标,尤其是PPO活性和Pro含量。
