臭氧和干旱对梓树叶片色素含量和荧光生理的影响
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摘要
以1年生梓树幼苗为材料,研究臭氧、干旱及其交互作用对梓树叶片色素含量和荧光生理的影响。结果表明:梓树叶片含水量和相对含水量在干旱处理下显著下降,在臭氧处理下无显著变化,在复合处理下干旱是叶片水分下降的主要原因。单独臭氧或干旱处理下梓树叶片叶绿素和胡萝卜素含量先升后降,轻度干旱可以减缓臭氧对光合色素含量的降解,但重度干旱加重了对叶片的伤害。梓树叶片的ΦPSII和Fv/Fm在轻度干旱处理下显著上升,在臭氧处理下没有显著变化,但在重度干旱处理下显著降低,臭氧和重度干旱复合处理具有协同作用,显著降低了梓树叶片Fv/Fm。梓树对于高浓度臭氧和干旱都有一定的抗性,轻度干旱可以提高梓树的光合作用,但是臭氧和重度干旱对梓树光合系统协同伤害。
An experiment was conducted to investigate the effects of ozone,drought and their interaction on pigment content and fluorescence physiology in 1-year-old Catalpa ovata seedlings. The results show that water content and relative water content of C. ovata decrease significantly under drought treatment,but no significant change under ozone treatment. Drought is the main reason for water loss of leaves under combined treatment. The content of chlorophyll and carotene in the leaves of C. ovata raise first and then decrease under ozone or drought treatment.Middle drought could slow down the degradation of photosynthetic pigments with ozone,but severe drought aggravated the damage. ΦPSII and Fv/Fmraise sharply under mild drought treatment,no significant change under the ozone treatment,but significantly reduce under severe drought treatment,interaction of ozone and severe drought have synergistic effects and significantly reduce Fv/Fmof C. ovata leaves. C. ovata has certain resistance to elevated ozone concentration and drought,mild drought could improve the photosynthesis of C. ovata,but ozone and severe drought have synergistic damage on the photosynthetic system of C. ovata.
An experiment was conducted to investigate the effects of ozone,drought and their interaction on pigment content and fluorescence physiology in 1-year-old Catalpa ovata seedlings. The results show that water content and relative water content of C. ovata decrease significantly under drought treatment,but no significant change under ozone treatment. Drought is the main reason for water loss of leaves under combined treatment. The content of chlorophyll and carotene in the leaves of C. ovata raise first and then decrease under ozone or drought treatment.Middle drought could slow down the degradation of photosynthetic pigments with ozone,but severe drought aggravated the damage. ΦPSII and Fv/Fmraise sharply under mild drought treatment,no significant change under the ozone treatment,but significantly reduce under severe drought treatment,interaction of ozone and severe drought have synergistic effects and significantly reduce Fv/Fmof C. ovata leaves. C. ovata has certain resistance to elevated ozone concentration and drought,mild drought could improve the photosynthesis of C. ovata,but ozone and severe drought have synergistic damage on the photosynthetic system of C. ovata.
引文
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[17]罗永忠,李广,闫丽娟,等.水分胁迫下新疆大叶苜蓿水分代谢指标变化及相互关系研究[J].草地学报,2016,24(5):981-987.
[18]张越,董喜光,薛立,等.臭氧胁迫对山杜英幼苗生理的影响[J].中南林业科技大学学报,2015,35(9):97-103.
[19]李丽,牛俊峰,文志,等.干旱和臭氧浓度升高对元宝枫早生和晚生叶片色素和脱落酸含量的影响[J].生态学报,2016,36(21):6804-6811.
[20]平琴,徐胜,李静,等.坪用白三叶(Trifolium repens)对高浓度臭氧的生理生态响应[J].生态学杂志,2017,36(5):1234-1242.
[21]李晓,冯伟,曾晓春.叶绿素荧光分析技术及应用进展[J].西北植物学报,2006,26(10):2186-2196.
[22]耿东梅,单立山,李毅,等.土壤水分胁迫对红砂幼苗叶绿素荧光和抗氧化酶活性的影响[J].植物学报,2014,49(3):282-291.
[23]朱治林,孙晓敏,赵风华,等.鲁西北平原冬小麦田臭氧浓度变化特征及对产量的潜在影响和机理分析[J].植物生态学报,2012,36(4):313-323.
[24]罗桑卓玛,辛福梅,杨小林,等.干旱胁迫对香柏幼苗生长和生理指标的影响[J].西北农林科技大学学报(自然科学版),2015,43(5):1-8.
[25]李秋静,卢广超,薛立,等.臭氧与干旱胁迫对华南地区3种绿化树种荧光生理的影响[J].华南农业大学学报,2015,36(1):91-95.
[2] Sitch S,Cox P M,Collins W J,et al. Indirect radiative forcing of climate change through ozone effects on the landcarbon sink[J]. Nature,2007,448(7155):791-794.
[3]唐孝炎,张远航,邵敏.大气环境化学[M].北京:高等教育出版社,2006.
[4] Dai A G. Drought under global warming:a review[J].Wiley Interdisciplinary Reviews:Climate Change,2010,2(1):45-65.
[5]史军,梁萍,万齐林,等.城市气候效应研究进展[J].热带气象学报,2011,27(6):942-951.
[6]辛月,高峰,冯兆忠.不同基因型杨树的光合特征与臭氧剂量的响应关系[J].环境科学,2016,37(6):2359-2367.
[7]牛俊峰,张巍巍,李丽,等.臭氧浓度升高对香樟叶片光合色素及抗过氧化的影响及其氮素响应[J].生态学报,2012,32(16):5062-5070.
[8]耿东梅,单立山,李毅,等.土壤水分胁迫对红砂幼苗叶绿素荧光和抗氧化酶活性的影响[J].植物学报,2014,49(3):282-291.
[9]林伟通,庄雪影,詹红星,等.干旱与复水对中华润楠幼苗生长及生理特性的影响[J].西南林业大学学报,2017,37(5):35-41.
[10]高峰,李品,冯兆忠.臭氧与干旱对植物复合影响的研究进展[J].植物生态学报,2017,41(2):252-268.
[11]朱国飞,姜卫兵,翁忙玲,等.梓树的文史内涵及其在园林绿化中的应用[J].中国农学通报,2010,26(15):301-305.
[12]熊冬兰,李静,徐胜,等.臭氧胁迫对梓树光合生理特性的影响[J].生态学杂志,2017,36(4):944-950.
[13]岑显超.不同品种(类型)楸树苗木对干旱胁迫的生理响应[D].南京:南京林业大学,2008.
[14]高俊凤.植物生理学试验指导[M].北京:高等教育出版社,2006.
[15]李合生.植物生理生化试验原理和技术[M].北京:高等教育出版社,2000.
[16]王爱玲,蔡军社,白世践,等.葡萄砧木叶片含水量和相对含水量的研究[J].天津农业科学,2013,19(2):16-18.
[17]罗永忠,李广,闫丽娟,等.水分胁迫下新疆大叶苜蓿水分代谢指标变化及相互关系研究[J].草地学报,2016,24(5):981-987.
[18]张越,董喜光,薛立,等.臭氧胁迫对山杜英幼苗生理的影响[J].中南林业科技大学学报,2015,35(9):97-103.
[19]李丽,牛俊峰,文志,等.干旱和臭氧浓度升高对元宝枫早生和晚生叶片色素和脱落酸含量的影响[J].生态学报,2016,36(21):6804-6811.
[20]平琴,徐胜,李静,等.坪用白三叶(Trifolium repens)对高浓度臭氧的生理生态响应[J].生态学杂志,2017,36(5):1234-1242.
[21]李晓,冯伟,曾晓春.叶绿素荧光分析技术及应用进展[J].西北植物学报,2006,26(10):2186-2196.
[22]耿东梅,单立山,李毅,等.土壤水分胁迫对红砂幼苗叶绿素荧光和抗氧化酶活性的影响[J].植物学报,2014,49(3):282-291.
[23]朱治林,孙晓敏,赵风华,等.鲁西北平原冬小麦田臭氧浓度变化特征及对产量的潜在影响和机理分析[J].植物生态学报,2012,36(4):313-323.
[24]罗桑卓玛,辛福梅,杨小林,等.干旱胁迫对香柏幼苗生长和生理指标的影响[J].西北农林科技大学学报(自然科学版),2015,43(5):1-8.
[25]李秋静,卢广超,薛立,等.臭氧与干旱胁迫对华南地区3种绿化树种荧光生理的影响[J].华南农业大学学报,2015,36(1):91-95.