[1]刘臣琼,王小德*,张娟,等. 涝渍胁迫下厚皮香幼苗光响应特征[J].西北林学院学报,2016,31(4):48-52.[doi:doi:10.3969/j.issn.1001-7461.2016.04.09]
　LIU Chen-qiong,WANG Xiao-de*,ZHANG Juan,et al. Light Response Characteristics of Photosynthesis of Ternstroemia gymnanthera with Waterlogging Stress[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2016,31(4):48-52.[doi:doi:10.3969/j.issn.1001-7461.2016.04.09]
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 涝渍胁迫下厚皮香幼苗光响应特征()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第31卷
期数:
2016年第4期
页码:
48-52
栏目:
出版日期:
2016-07-31

文章信息/Info

Title:
 Light Response Characteristics of Photosynthesis of Ternstroemia gymnanthera with Waterlogging Stress
文章编号:
1001-7461(2016)04-0048-05
作者:
 刘臣琼1; 王小德1*; 张娟1; 刘钰欣2
 (1.浙江农林大学 风景园林与建筑学院，浙江 临安 311300；2.湖南农业大学 生物科学技术学院，湖南 长沙 410000)
Author(s):
 LIU Chen-qiong1; WANG Xiao-de1*; ZHANG Juan1; LIU Yu-xin2
 (1.School of Landscape and Architecture,Zhejiang A&F University,Linan,Zhejiang 311300,China; 2.School of Biological Science and Technology,Hunan Agricultural University,Changsha,Hunan 410000,China)
关键词:
厚皮香; 涝渍胁迫; 光响应模型; 光合参数
Keywords:
Ternstroemia gymnanthera;  waterlogging stress;  light response model;  photosynthetic parameters
分类号:
S718.3
DOI:
doi:10.3969/j.issn.1001-7461.2016.04.09
文献标志码:
A
摘要:
 以1年生厚皮香幼苗为材料，分别进行涝害与渍害处理，使用Li-6400光合仪，测定不同光照强度下的净光合速率Pn，并采用直角双曲线、非直角双曲线和直角双曲线修正3种数学模型对叶片光响应曲线进行拟合，探讨其在不同水淹程度下的光能利用能力。结果表明：随着光合有效辐射的增加，对照组在PAR≈800 μmol·m-2·s-1、渍害组在PAR≈500 μmol·m-2·s-1时，Pn增减趋势变得平缓。渍害组、涝害组与对照组相比初始量子效率和最大净光合速率Pnmax都下降，暗呼吸速率Rd则上升；涝渍胁迫对厚皮香幼苗有光合抑制作用，直角双曲线修正模型对厚皮香幼苗叶片光响应过程拟合精确度高于直角双曲线和非直角双曲线2种模型；对照组厚皮香幼苗叶片由数学模型拟合的光合参数值与渍害和涝害2组相比，更为准确。
Abstract:
 Taking 1-year-old seedlings of Ternstroemia gymnanthera as materials that were subject to waterlogging with two levels (the water level was the same as the soil surface,ZH group,and higher than the soil surface,LH group),the net photosynthetic rates (Pn) of the T.gymnanthera seedlings under different light intensities were measured by portable photosynthesis system Li-6400.The light response curves were fitted by three models,such as the rectangular hyperbola,non-rectangular hyperbola and modified rectangular hyperbolar to examine the light energy utilization ability of T.gymnanthera under different water stresses.The results indicated that with the increase of photosynthetic active radiation (PAR),once the PAR for the control group reached to about 800 μmol·m-2·s-1）and the ZH group reached to about 500 μmol·m-2·s-1,the variation trends of Pn became gentle.Compared with the control group,the initial quantum efficiency α of both ZH group and LH group decreased,the maximum net photosynthetic rate Pnmax decreased and the dark respiration rate Rd increased.The fitting effect of the rectangular hyperbola model for light response process was better than that of the other two models.The fitted light response curve of the control group was more accurate than those of ZH and LH groups.

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[1]吴静,王小德*,叶建峰,等. 涝渍胁迫对鸡爪槭幼苗光合生理特性的影响[J].西北林学院学报,2014,29(05):26.[doi:doi:10.3969/j.issn.1001-7461.2014.05.05]
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备注/Memo

备注/Memo:
 收稿日期：2015-09-14修回日期：2015-11-12
作者简介：刘臣琼，女，硕士研究生，研究方向：植物景观设计与评价。E-mail:457478952@qq.com
*通信作者：王小德，男，教授，博士，硕士生导师，研究方向：园林植物引种与应用、植物造景和生态园林等。E-mail:wxd65@zafu.Edu.cn
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