Effects of salt-alkali stress on active oxygen metabolism in roots of Spiraea × bumalda 'Gold Mound' and Spiraea × bumalda 'Gold Flame'

Under artificially-simulated complex salt-alkali stress, the levels of active oxygen metabolism in roots were studied using three-year-old cutting seedlings of Spiraea × bumalda ‘Gold Mound＇ and Spiraea × bumalda ‘Gold Flame＇. The present study aimed at exploring the antioxidant capacity in roots of spiraeas and revealing their adaptability to salt-alkali stress. Results indicate that the oxygen free radicals contents, electrolyte leakage rates and MDA contents in roots of Spiraea × bumalda ＇Gold Mound＇ and Spiraea × bumalda ＇Gold Flame＇ show an increasing tendency with the increases of the salinity and pH value, whereas the activities of superoxide dismutase （SOD）, peroxidase （POD） and catalase （CAT） all increased firstly and then decreased. With the increase in intensity of salt-alkali stress, the CAT activity in roots of Spiraea × bumalda ‘Gold Flame＇ is higher and the increasing extents in the oxygen free radicals contents, electrolyte leakage rates as well as MDA contents are lower compared with Spiraea × bumalda ‘Gold Mound＇, indicating that Spiraea × bumalda ‘Gold Flame＇ has a stronger antioxidant capacity.

季节变化对金焰绣线菊和珍珠绣线菊叶片性状的影响

以金焰绣线菊和珍珠绣线菊为研究对象,采用指甲油印迹法制片,运用成像系统辅助观察两种绣线菊的叶片特征,观察季节变化对两种绣线菊叶片性状的影响.结果表明,金焰绣线菊的叶面积、叶厚度、叶脉密度和气孔的长度和宽度均大于珍珠绣线菊,气孔密度小于珍珠绣线菊;季节变化对金焰绣线菊和珍珠绣线菊的叶性状造成一定的影响,对金焰绣线菊的影响更大.

东北金焰绣线菊繁殖技术

对引进的金焰绣线菊的植物学特性、生长节律及繁殖技术等方面进行研究的结果表明:金焰绣线菊适应性强、喜光耐寒、抗旱耐贫瘠、易繁殖、无病虫害;枝繁叶茂、花色秀丽、观赏期长、冠形优美、不必修剪,是观赏价值高、发展前景广的园林美化彩色叶花灌木新品种。

金山绣线菊和金焰绣线菊在佳木斯市的引种适应性研究

对在佳木斯市新引种栽培的金山绣线菊和金焰绣线菊的物候期和抗寒性及生活力等进行观察,结果表明:金山绣线菊和金焰绣线菊在佳木斯地区的萌发期为4月下旬,展叶期为4月末,现蕾期为6月上旬,初花期为6月中下旬,抗寒性一般,等级为Ⅳ级,生活力等级为Ⅱ级,较好。初步认为作为地被植物可以在佳木斯市绿化中应用。

金焰绣线菊的试管苗繁殖研究

以金焰绣线菊带有分蘖芽的茎段为材料,进行了生根、继代、移栽以及定植的研究,建立起金焰绣线菊的快速繁殖体系,从而加快其繁殖速度,满足栽培的需求。结果表明:1/2MS+蔗糖12g/L+ABT2号1.5mg·L-1+IBA0.2mg·L-1是带有分蘖芽的茎段试管苗生根和试管苗生根继代繁殖培养的适宜培养基。试管苗移栽成活率为97.3%,定植成活率为99.5%。定植的试管苗植株整齐、生长旺盛,不仅保持了金焰绣线菊的植物特征,也保持了较好的观赏效果。