文献类型：期刊文献

中文题名：崖柏幼苗光合作用与叶绿素荧光参数对自然降温的响应

英文题名：The response of photosynthetic characteristics and chlorophyll fluorescence parameters of Thuja sutchuenensis seedlings to natural cooling

作者：朱莉[1,2] 郭泉水[1] 金江群[3] 刘建锋[4] 李志勇[2] 许格希[1,5]

第一作者：朱莉

机构：[1]中国林业科学研究院森林生态环境与保护研究所,国家林业局森林生态环境重点实验室;[2]河南科技大学农学院;[3]重庆药用植物研究所;[4]中国林业科学研究院林业研究所;[5]北京林业大学省部共建森林培育与保护教育部重点实验室

年份：2013

卷号：36

期号：4

起止页码：49-55

中文期刊名：河北农业大学学报

外文期刊名：Journal of Agricultural University of Hebei

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD_E2013_2014】；

基金：国家林业局野生动植物保护专项:"世界级极危物种崖柏潜在分布和生态适应性研究(2012-1)";优化项目"珍稀濒危物种崖柏野外救护与人工繁育(1691000401)";中央公益性科研院所专项基金(RIF2010-15)

语种：中文

中文关键词：崖柏幼苗;光合作用;叶绿素荧光;自然降温;光合响应

外文关键词：Thuja sutchuenensis; photosynthetic; chlorophyll fluorescence; seasonal cooling;photosynthetic response

分类号：S791.37

摘要：以从原生地(30°43′N,108°50′E,海拔1 585.2m)迁入中国林科院(39°57′N,116°17′E,海拔57.5m)的崖柏幼苗为对象,研究其叶片形态、光合作用和叶绿素荧光参数对迁入地秋冬季节性自然降温的响应。结果表明:在迁入地持续低温降到日均温-7.77℃,最低温度-13.96℃时,大部分崖柏幼苗叶片卷曲,出现明显地冻害症状;在叶片受害症状出现之前,随着温度的不断下降,叶片的净光合速率(Pn)、最大光合速率(Pmax)、表观量子效率(Ф)、蒸腾速率(Tr)、气孔导度(Gs)、叶绿素含量、PSⅡ原初光能转换效率(Fv/Fm)、PSⅡ潜在活性(Fv/Fo)、PSⅡ有效光量子产量(Fv′/Fm′)、光化学淬灭系数(qP)和非光化学淬灭系数(NPQ)等均呈下降变化趋势。胞间CO2浓度(Ci)总体呈现增加趋势,暗呼吸速率(Rd)逐渐增强。当持续低温降至日平均气温-6.40℃,日最低气温-10.46℃时,崖柏幼苗的净光合值接近于0。光合机构受损是崖柏幼苗在迁入地秋冬季节性自然降温过程中光合能力下降的主要原因。
This paper focused on the Thuja sutchuenensis, which moved to Chinese Academy of For- estry from its original habitat. Study on the response of leaf shapes, photosynthetic characteristics and chlorophyll fluorescence parameters of T. sutchuenensis seedlings to the process of seasonal cooling in re- settlement areas in autumn and winter. The results showed that： when the daily average air temperaturedecreased to -- 7.77 ℃, the daily minimum air temperature decreased to -- 13. 9 6℃ , most of T. sutchuenensis seedling leaves were curled, appeared to freeze injury symptoms. The net pho- tosynthetic rate （Pn）, the maximum photosynthetic rate （Pmax）, apparent quantum yield（Ф）, transpi- ration rate （Tτ）, stomatal conductance（Gs）, chlorophyll content, PSⅡ primary energy conversion effi- ciency （Fv/Fm）, PSⅡ potential activity （Fv/Fo）, photochemical efficiency of PSⅡ in the light （Fv＇/ Fm＇）, photochemical quenching （qP） and non-photochemical quenching （NPQ） decreased along with the temperature continued to decline before the freeze injury symptoms. While intercellular CO2 con- centration （Ci） showing an overall increasing trend, and dark respiration rate （Rd） was gradually in- creased. When the continuous low temperature dropped to daily average temperature of --6.40 ℃ and --10.46 ℃ daily minimum temperature, the net photosynthesis value of T. sutchuenensis seedlings closed to 0. Therefore, the damage to the photosynthetic apparatus is the main reason for the decline of the photosynthetic capacity of T. sutchuenensis seedlings to the process of seasonal cooling in reset- tlement areas.