文献类型：期刊文献

中文题名：苦杨×小叶杨杂交F1代苗期抗旱性比较研究

英文题名：Comparative Study on the Drought Resistance of Young Seedling from Populus laurifolia×P.simonii F1 Progeny

作者：张蕾[1] 姜鹏飞[1] 王一鸣[2] 刘妍婧[1] 曾庆银[1]

第一作者：张蕾

机构：[1]中国林业科学研究院,林木遗传育种国家重点实验室,北京100091;[2]北京林业大学生物科学与技术学院,北京100083西南大学生命科学学院,重庆400715

年份：2023

卷号：58

期号：4

起止页码：519-534

中文期刊名：植物学报

外文期刊名：Chinese Bulletin of Botany

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：国家重点研发计划(No.2022YFD2200102);国家自然科学基金(No.32101552)。

语种：中文

中文关键词：杨树;杂交;苗期;抗旱性;评价

外文关键词：poplar;hybrid;seedling stage;drought resistance;evaluation

分类号：S51

摘要：创制抗旱林木新品种对维持我国干旱半干旱地区森林生产力,应对全球气候变暖具有重要意义。苦杨(Populus laurifolia)是分布在新疆额尔齐斯河流域的我国乡土树种,具有速生和耐寒等优良特性,而小叶杨(P.simonii)具有抗旱和耐瘠薄特性。我们对苦杨×小叶杨杂交F1代幼苗的抗旱性进行全面分析和综合评价。测定了正常生长与干旱胁迫下亲本和杂交F1代的株高生长量和叶片相对含水量等7个生长指标,净光合速率和胞间CO_(2)浓度等6个光合参数,以及SOD活性和MDA含量等5个抗旱生化指标。对18个性状指标进行抗旱系数和隶属函数分析,将亲本及23个F1代幼苗划分为高、中和低3个抗旱类型。高度抗旱型幼苗的叶片、上表皮、下表皮和栅栏组织厚度较大,叶片组织结构紧密度高,且在干旱胁迫下抗旱关键基因的表达量显著高于其它抗旱类型幼苗。该研究为杨树抗旱育种提供了理论指导和基础材料。
The development of drought-resistant tree varieties is of great significance for maintaining forest productivity in arid and semi-arid regions of China and addressing the challenges of global climate change.Populus laurifolia is distributed in the Irtysh River Basin in Xinjiang,China,has excellent characteristics such as fast growth and cold resistance.P.simonii has the characteristics of drought resistance and barren resistance,and is widely planted in northern China.In this study,the drought resistance characteristics of P.laurifolia×P.simonii F1 progeny were comprehensively analyzed and evaluated.We investigated seven growth parameters such as high growth and relative leaf water content,six photosynthetic parameters such as net photosynthetic rate and intercellular CO_(2) concentration,and five biochemical characteristics such as SOD activity and MDA content.Based on the drought resistance coefficient and membership function analysis of 18 trait parameters,the parent and 23 F1 progeny were divided into three drought resistance types:high,medium and low.Compared to other two drought resistance types seedlings,the highly drought-resistant F1 progeny seedlings had larger leaf thickness,upper and lower epidermis thickness,palisade tissue thickness,and leaf tissue compactness.For highly drought-resistant F1 progeny seedlings,the expression levels of key drought resistance genes under drought stress were significantly higher than other two drought resistance types.This study provides theoretical guidance and material basis for breeding drought-resistant poplar.