海水胁迫下2种观赏植物的生长与生理特性比较  

Seawater stress on vegetative and physiological characteristics of Photinia glabra × P. fraseri ‘Red Robin’ and Euonymus japonica ‘Aureo-marinatus’ cuttings

作　　者：申亚梅[1] 童再康[2] 马进[1] 吕健全[3] 韩潇[4] 巴蕾[1] 房亮亮[1] 

机构地区：[1]浙江林学院园林学院,浙江临安311300 [2]浙江林学院林业与生物技术学院,浙江临安311300 [3]浙江林学院理学院,浙江临安311300 [4]北京林业大学生物科学与技术学院,北京100083

出　　处：《浙江林学院学报》2009年第4期490-497,共8页Journal of Zhejiang Forestry College

基　　金：浙江省科技厅长三角联合攻关项目(2005E60013)

摘　　要：采用水培的方式,用1/2Hoagland’s营养液培养红叶石楠红罗宾Photinia glabra×P.fraseri‘Red Robin’与金边黄杨Euonymus japonica‘Aureo-marinatus’幼苗稳定后进行处理,设海水体积分数为0(对照),10%,30%,50%,70%和100%等6个处理。随后分别在第3,6,9,12和15d采样进行分析,研究不同体积分数海水处理下2个观赏树种1年生幼苗形态、保护性酶活性及离子吸收分布的影响情况。结果表明:①红叶石楠在海水体积分数高于30%(pH8.92)时与金边黄杨低于50%(pH9.12)时,两者形态均发生变化。②随着海水体积分数的增加,胁迫时间的延长,红叶石楠与金边黄杨叶片内的超氧化物歧化酶(SOD)呈增加趋势,且前者叶片中丙二醛(MDA)质量摩尔浓度呈上升趋势,后者呈现下降趋势。③随着海水体积分数的增加,红叶石楠与金边黄杨叶片内钠离子(Na+)质量浓度均增加,并且前者的涨幅低于后者,此外两者叶片中钾(K+)、钙(Ca2+)、镁(Mg2+)离子质量浓度均出现无规律变化,且值低于对照。经过比较得出,在海水的胁迫下,红叶石楠的耐盐性低于金边黄杨,并且两者均能适应pH8.50以上的环境,均属于碱土植物。To study the effects of seawater concentration on growth, osmotic accumulation of antioxidant enzymes, and ion distribution with Photinia glabra x Photiniafraseri ＇Red Robin＇ and Euonymus japonica ＇Aureo-marginatus＇ seedlings, pot experiments were conducted. A randomized complete block design with six treatments consisting of 0%（a control）, 10%, 30%, 50%, 70%, and 100% seawater and three repli- cates was used. Plants were harvested 3, 6, 9, 12, and 15 d after treatment and analyzed with ANOVA and multiole comparison for mean separation. Results showed that 1 ） when seawater concentration was 30% （pH 8.92） for ＇Red Robin＇ and 50% （pH 9.12） for ＇Aureo-marginatus＇, the configuration changed Also, 2） compared with control plants, superoxide dismutase （SOD） activity was significantly greater （P〈 0.05） in leaves of seawater-stressed ＇Aureo-marginatus＇, and increased with increasing seawater concentrations. Malondialdehyde （MDA） content in leaves of ＇Red Robin＇ seawater concentrations but with ＇Aureo-marginatus＇ MDA increased （P〈0.01） with increasing decreased（P〈0.01）. Finally, 3） with increasing seawater concentration, Na^＋ concentrations of the two cuhivars increased; K^＋, Ca^2＋ and Mg^2＋. concentra- tions showed no pattern, but all concentrations were lower than the control. Thus, the present study strongly suggested that the salt resistance of ＇Red Robin＇ was lower than ＇Aureo-marginatus＇ ; however, because both were alkali-soil plants, they could adapt to appropriate concentrations of seawater irrigation. [Ch, 1 fig. 6 tab. 24 ref.]

关 键 词：植物学 海水胁迫 红叶石楠红罗宾 金边黄杨 生理特性 

分 类 号：S718.4[农业科学—林学]