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Seedling ofWisteria floribunda, which belongs to the twiner type of climbing plants, were planted in nursery and the effect of support on the growth of
the seedlings was tested. The seedlings were grown with 240 cm-height and 120 cm-height supports (the culms of a dwarf bamboo),
and without support. Positive effect of the supports and its length were observed for stem length ofW. floribunda at the end of the growing season. The positive effect of support was also observed for total dry weight. Total dry weight
with 240 cm-height support reached more than the double of the seedlings without support. These effects of the support were
attributed to die-back behavior of the twining stem, which detached from the support or did not encounter the support. Diameter
of the stems without support showed a rapid decrease toward the stem tip, while that with support were relatively constant
when they were twining around the support. The existence of the support also affected the dry matter allocation in this species;
supported seedlings allocated larger proportion of biomass to current-year stems than unsupported seedlings, although the
allocation to the roots was smaller in the supported treatments. Support availability may be critical for the establishment
and further growth of the seedlings ofW. floribunda which regenerate at the forest edge and canopy gaps.
A part of this report was presented at the 107th Annual Meeting of the Japanese Forestry Society, at Tsukuba, April, 1996. 相似文献
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部分紫藤属资源遗传多样性的ISSR分析 总被引:1,自引:0,他引:1
利用ISSR分子标记技术对21个从日本引进的多花紫藤品种(Wisteria floribunda)和3个紫藤属(Wisteria Nutt.)植物基因组DNA进行扩增,分析其遗传多样性和亲缘关系.结果表明:利用筛选出的18条引物,共扩增得到清晰的多态性条带100条,多态性带比例为88.50%,Nei遗传多样性指数(H)为0.0655~0.4995,Shannon信息多样性指数(I)为0.1484~0.6926,遗传相似系数介于0.57~0.96,表明紫藤种质资源存在丰富的遗传多样性.聚类分析结果将24个种或品种分为三大类群,可为紫藤种质资源选育利用提供参考. 相似文献
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为探讨植物花期香气成分及其相对含量变化,采用动态顶空气体循环采集法和热脱附-气相色谱-质谱(TDSGC-MS)联用技术对日本紫藤Wisteria floribunda不同开花时期释放挥发性有机化合物组分及其相对含量进行测定。结果表明:日本紫藤鲜花释放的挥发性有机化合物包括萜烯类、酯类、醇类、醛类、酮类、酚类、芳香烃类和烷烃类等34种化合物;其释放量在花蕾期较少(229.68峰面积单位),初开期逐渐增加(378.16),盛开期最高(605.57),其中萜烯类数量最多(10~12种),其相对含量花蕾期为69.0%,初开期50.0%,盛开期59.0%,在各阶段的总峰面积依次为159.26,189.43,355.61。罗勒烯、乙酸叶醇酯、柠檬烯、α-蒎烯等是日本紫藤鲜花的主要香气成分。 相似文献
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紫藤花挥发油的提取与化学成分的研究 总被引:1,自引:1,他引:0
[目的]研究延安产紫藤花挥发油化学成分,为其开发利用奠定基础。[方法]采用水蒸汽蒸馏法及超声协助水蒸汽蒸馏提取紫藤花挥发油,采用气相色谱-质谱-数据系统分析法进行分析,用色谱峰面积归一化法测定各组分相对含量。[结果]共鉴定出38种化学成分,占紫藤花挥发油总量的77.79%,成分主要有醇类、烯类、酯类、烷类和酮类等多种化合物。陕西延安生长的紫藤花所含挥发油的成分中,检测到了未曾报道的(9Z)-1,1-二甲氧基-9-十八烯、2-(3-甲基-环氧乙基)-甲醇、10-甲基十九烷、苯甲酸-2-苯乙酯、6,10,14-三甲基-2-十五烷酮、沉香醇和3-烯丙基-2-甲氧基苯酚等化学成分。[结论]地理环境的差异,会导致植物所含的化学成分发生某些改变。 相似文献
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紫藤鲜花在不同开花期的头香成分 总被引:2,自引:1,他引:1
采用固相微萃取(SPME)吸附不同开花期紫藤Wisteria sinensis鲜花的头香成分,并用气相色谱-质谱法(GC-MS)定量分析紫藤鲜花的头香成分,鉴定出芳樟醇、2-壬酮、反式罗勒烯、2-十一酮、3-[4,8-二甲基-3,7-壬二烯基]-呋喃、2-十三酮、4-丙酮基环庚酮、α-蒎烯氧化物、异草蒿脑和α-金合欢烯等47种化合物;同时考察了紫藤鲜花在不同开花期头香成分的变化情况:随着紫藤花开放进程,挥发性香气成分浓度逐渐增大,盛开期达到最大,后逐渐减小。SPME-GC-MS是一种可用于分析不同开花期鲜花香气成分变化的简单可行的分析方法。 相似文献
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紫藤花色苷的提取及稳定性研究 总被引:1,自引:0,他引:1
[目的]为提取紫藤花色苷寻求一种好的方法。[方法]采用正交试验研究了紫藤花色苷的提取条件,并探讨其理化性质。[结果]用料液比1∶20,90%乙醇和1%盐酸在45℃条件下浸提3h,提取效率最好;花色苷色素溶液的颜色随着溶液pH值的改变而变化,金属离子Na^+、Cu^2+、Zn^2+、Mg^2+对花色苷色素颜色无影响;色素溶液的氧化性、还原性均较差;蔗糖、葡萄糖和柠檬酸等食品添加剂对色素稳定性均无显著影响。[结论]紫藤花色苷是一种有前途的天然色素。 相似文献