美洲黑杨及其杂种F1无性系光合特性的研究
以美洲黑杨杂种F1代及亲本为研究材料,对叶面积、气体交换指标、气孔特征和RuBP羧化酶活性等进行测定,以揭示美洲黑杨亲本与杂交子代的光合速率、气孔特征、RuBP羧化酶活性差异及其相互之间的关系,进而探讨美洲黑杨不同生长势子代形成的生物学机理.结果表明:与亲本和低亲子代相比,超高亲子代H1、H2的光合面积(单叶面积和单株叶面积)最大、光合生产率(平均超母本46.22%,超父本66.37%)、叶绿素含量最高(平均超母本280.09%,超父本452.29%)、RuBP羧化酶活性最大(平均超母本20.79%,超父本58.56%),上、下表皮数量比和气孔频度最大,光饱和点最高(平均为2 189.33 μ...
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| Published in | 林业科学研究 Vol. 27; no. 6; pp. 721 - 728 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
林木遗传育种国家重点实验室,中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091
2014
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1498 |
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| Summary: | 以美洲黑杨杂种F1代及亲本为研究材料,对叶面积、气体交换指标、气孔特征和RuBP羧化酶活性等进行测定,以揭示美洲黑杨亲本与杂交子代的光合速率、气孔特征、RuBP羧化酶活性差异及其相互之间的关系,进而探讨美洲黑杨不同生长势子代形成的生物学机理.结果表明:与亲本和低亲子代相比,超高亲子代H1、H2的光合面积(单叶面积和单株叶面积)最大、光合生产率(平均超母本46.22%,超父本66.37%)、叶绿素含量最高(平均超母本280.09%,超父本452.29%)、RuBP羧化酶活性最大(平均超母本20.79%,超父本58.56%),上、下表皮数量比和气孔频度最大,光饱和点最高(平均为2 189.33 μmol·m^-2 · s^-1),而光补偿点、表观量子效率和暗呼吸速率最低,使其具有更广的光强适应能力,高效的光能吸收、转化和碳固定速率,并促进干物质积累和器官形态建成,从而提高生长速度.单株叶面积、光合生产率和叶绿素含量可作为生长量评选的间接指标. |
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| Bibliography: | GAO Ming,DING Chang-jun,SU Xiao-hua,HUANG Qin-jun(State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Key laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China) 11-1221/S In order to observe the divergence and relationship between photosynthetic rate,stomatal characteristics and RuBPCase activity among Populus deltoides Bartr.parents and their F1 hybrids and interpret biological mechanism of different growth vigor of P.deltoides,leaf area,gas exchange,stomatal characteristics and RuBPCase activity of intraspecific F1 hybrids and parents of P.deltoides were measured.The results showed that compared with parents and lower-parents F1 hybrids,the better-parent F1 hybrids possessed the largest photosynthetic area (including single leaf area and leaf area per plant),the highest photosynthetic productivity (the average of H1 and H2 was 46.22% higher than maternal parent and 66.37% higher than paternal parent),chlor |
| ISSN: | 1001-1498 |