欢迎访问《中国农学通报》，
中国农学通报

中国农学通报 ›› 2014, Vol. 30 ›› Issue (25): 38-42.doi: 10.11924/j.issn.1000-6850.2014-0956

• 林学 园艺 园林 • 上一篇    下一篇

紫薇优良无性系生长和光合特征分析

黄国伟 李振芳 申伟 王瑞文 杨彦伶   

  • 收稿日期:2014-04-04 修回日期:2014-06-26 出版日期:2014-09-05 发布日期:2014-09-05
  • 基金资助:
    湖北省自然科学基金项目 “湖北主要乡土园林植物种质资源收集及遗传特性研究” (2008CDA076)。

Analysis of the Growth and Photosynthetic Characteristics of the Superior Clones in Lagerstroemia indica

  • Received:2014-04-04 Revised:2014-06-26 Online:2014-09-05 Published:2014-09-05

PDF (PC)

518

摘要： 通过评价紫薇优良无性系的生长和光合特性，为其合理配置和科学栽植提供理论依据。以引进和选育的5个紫薇优良无性系为试验材料，进行相关特征测定，比较5个紫薇优良无性系的生长和光合特征差异。研究结果表明：5个无性系生长和光合生理特征差异达到了极显著水平(P＜0.01)，地径、叶长、叶宽、枝长、枝基径、叶绿素a、叶绿素b等最小值分别为2.41 cm、6.13 cm、3.75 cm、0.72 m、0.95 cm、0.95 mg/g和0.24 mg/g，其中‘速生紫薇’地径(4.86 cm)、叶长(9.99 cm)、叶宽(6.13 cm)、枝长(1.77 m)、枝基径(1.80 cm)、叶绿素a(1.68 mg/g)、叶绿素b(0.49 mg/g)等均较突出；5个无性系光饱和点(LSP)在1672.05μmol/(m2·s)以上，较喜光，光补偿点(LCP)在20~31μmol/(m2·s)之间，最大净光合速率(Pnmax)大小排序为‘鄂薇2号’[25.43μmol/(m2·s)]＞‘速生紫薇’[19.67μmol/(m2·s)]＞‘鄂薇4号’[18.38μmol/(m2·s)]＞‘鄂薇1号’[16.64μmol/(m2·s)]＞‘鄂薇5号’[11.17μmol/(m2·s)]；相关分析表明叶片大、叶绿素含量高则耐荫性稍强，叶片暗呼吸速率对地径影响明显。在实际栽培中，可根据生长和光合特性，同时结合培育目标合理配置5个优良无性系。

关键词: 干旱区, 干旱区

Abstract: By evaluating the growth and photosynthetic characteristics of superior clones of Lagerstroemia indica, the research aims to provide a theoretical basis for the rational allocation and scientific planting. 5 superior clones of Lagerstroemia indica, which were from the introduction and breeding, were used as the experimental materials. By measuring the relevant characteristics, the authors compared the difference of the growth and photosynthetic characteristics between the five clones of Lagerstroemia indica. The result showed that there were highly significant differences in the growth and photosynthetic characteristics among 5 superior clones. The minimum value of the basal diameter, leaf length, leaf width, branch length, branch diameter, chlorophyll a and chlorophyll b were 2.41 cm, 6.13 cm, 3.75 cm, 0.72 m, 0.95 cm, 0.95 mg/g and 0.24 mg/g, respectively. The values of the fast- growing Lagerstroemia indica were more prominent in basal diameter (4.86 cm), leaf length (9.99 cm), leaf width (6.13 cm), branch length (1.77 m), branch basal diameter (1.80 cm), chlorophyll a (1.68 mg/g) and chlorophyll b (0.49 mg/g). The light saturation points (LSP) were more than 1672.05μmol/(m2·s) and the light compensation points (LCP) were from 20μmol/(m2·s) to 31μmol/(m2·s) in the 5 superior clones, the sequence of the maximum net photosynthetic rate (Pnmax) was‘Ewei No.2’ [25.43μmol/(m2·s)]＞‘Susheng Ziwei’[19.67μmol/(m2·s)]＞‘Ewei No.4’[18.38μmol/(m2·s)]＞‘Ewei No.1’[16.64μmol/(m2·s)]＞‘Ewei No.5’[11.17μmol/(m2·s)]. Correlation analysis showed that the shade tolerance could be improved if the clones had large leaves and high chlorophyll content, the dark respiration rate of leaves had a significantly influence on diameter. According to the growth and photosynthetic characteristics, combined with the aim of nurturing, the 5 superior clones should be configured reasonably in practical cultivation.