以菊花脑(Chrysanthemum nankingense)为实验材料,叶绿素提取量为指标,采用单因素试验(提取溶剂、浸提时间、液料比、温度)和三因素三水平正交试验法优化了菊花脑叶绿素的提取工艺条件.结果表明,影响叶绿素提取的主次因素为浸提时间＞温度＞液料比,并且浸提时间、液料比、温度的影响都达到了极显著水平；叶绿素最佳提取工艺条件为：以丙酮、无水乙醇及水比例为4.5∶4.5∶1的混合溶液作提取
Root gravitropism is affected by many environmental stresses,including salinity,drought,and nutrient deficiency.One significant environmental stress,excess ammonium (NH4+),is well-documented to inhibi
Breeding salinity-tolerant turfgrass became more important for turf irrigation used saline water and turf establishment in saline soil.Hybrid bermudagrass is a kind of widely used turfgrass in warm re
以目前园林绿化中广泛应用的‘青岛结缕草’和马尼拉为对照,对52份中国结缕草属野生种源的长期水分利用效率(WUEL)进行了测定并分析.结果如下：1)各种源的WUEL的变异范围为0.108％～0.384％,变异系数为25.86％.在52份供试种源中,WUEL显著高于马尼拉的有3份种源；WUE显著高于‘青岛结缕草’的有2份种源；WUEL同时显著高于对照的有2份种源.结缕草属植物的WUEL存在极显著的差异
The vacuole in plant cell plays a crucial role in plants tolerance to salinity.Two plant proton pumps,vacuolar H+-ATPase (V-H+-ATPase) and H+-pyrophosphatase (V-H+-PPase),participate in acidifying com
Field studies were conducted to investigate arsenic (As),copper (Cu) and zinc (Zn) contamination in agricultural soils and wheat crops at two areas in the proximity of a coal washery (Area A) and a co
以不同狼尾蕨品种两年生苗为材料,研究了自然干旱胁迫下不同狼尾蕨品种的细胞膜相对透性、可溶性糖、SOD、游离脯氨酸等生理指标的变化,以期综合评价2个狼尾蕨品种的抗旱性能.结果表明：干旱胁迫下,抗旱性强的1品种叶片中的叶绿素持有率高,可溶性糖随胁迫的加剧显著提高、相对电导率增加幅度小,SOD活性在胁迫后期显著提高.采用主成分分析法对所测生理指标进行分析,2个品种的耐旱性顺序为1＞2.
为评估除草剂百草枯的对水体生态系统的环境毒害效应,测定了百草枯对4株蓝藻：铜绿微囊藻(M.aeruginosa XW01,M.aeruginosa 7806)、平裂藻(Merismopedia sp.)、集胞藻(Synechocystis PCC 6803),两株绿藻：蛋白核小球藻(Chlorella pyrenoidosa)和绿球藻(Chlorococcum sp.)的毒害效应.采用半效抑制浓度