干旱胁迫对麻栎幼苗生长及生理生化特性的影响
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摘要
为了研究水分胁迫对麻栎幼苗的生长及生理生化特性的影响,以一年生麻栎幼苗为供试材料,试验共设W1、W2、W3、W4 4种水分处理,结果表明:水分胁迫下麻栎幼苗的相对株高生长、相对地径生长、相对冠幅以及生物量增量都随着水分胁迫程度的增加而减少,但是生物量增量在W2、W3、W4处理之间变化并不明显;叶片中游离脯氨酸含量、可溶性糖含量、MDA含量、可溶性蛋白质含量、细胞质膜透性随着土壤水分含量的减少而增大,保护酶SOD、POD、CAT活性先增加,但当土壤含水量达到田间持水量25%(W4处理)时,SOD、POD、CAT活性降低。随着水分胁迫加剧,麻栎幼苗通过增加根冠比以及提高保护酶活性。
To explore the growth,physiological and biochemical characteristics of Quercus acutissima under water stress,oneyear-old seedlings of Quercus acutissima were subjected to four levels of soil water stress. Results indicated that the relative growth,relative ground diameter growth,relative crown width and biomass increment of Quercus acutissima seedlings decreased with increase in water stress. However,the biomass increment did not change significantly between W2,W3 and W4 treatments. The content of free proline,soluble sugar,malondialdehyde(MDA),soluble protein and relative lipid membrane permeability in leaves increased with the decrease in soil moisture content. The activities of the protective enzymes superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT) increased at first,but their activities decreased when soil moisture content reached 25% of field capacity. With increase in water stress,seedlings of Quercus acutissima can reduce the damage caused by increasing root-shoot ratio and protective enzyme activity.
To explore the growth,physiological and biochemical characteristics of Quercus acutissima under water stress,oneyear-old seedlings of Quercus acutissima were subjected to four levels of soil water stress. Results indicated that the relative growth,relative ground diameter growth,relative crown width and biomass increment of Quercus acutissima seedlings decreased with increase in water stress. However,the biomass increment did not change significantly between W2,W3 and W4 treatments. The content of free proline,soluble sugar,malondialdehyde(MDA),soluble protein and relative lipid membrane permeability in leaves increased with the decrease in soil moisture content. The activities of the protective enzymes superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT) increased at first,but their activities decreased when soil moisture content reached 25% of field capacity. With increase in water stress,seedlings of Quercus acutissima can reduce the damage caused by increasing root-shoot ratio and protective enzyme activity.
引文
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[2]王瑞静,杨玉霞.麻栎繁殖栽培与造林技术[J].现代农村科技,2018(2):51-53.
[3]何慎,李恂,周洪舟,等.麻栎芽苗砧嫁接容器育苗技术研究[J].中国农学通报,2018,34(15):72-75.
[4]张军.麻栎丘岗地造林管理关键技术探析[J].林业科学,2013(7):110-113.
[5]姚婕,虞木奎.施肥对麻栎人工林生长及热值的影响[J].中国农学通报,2016,32(1):6-11.
[6]郝蓬莱,张金平,韩新英,等.干旱胁迫对麻栎无性系蒸腾作用的影响[J].林业科技开发,2012,26(3):62-65.
[7]董玉峰,姜岳忠,王华田,等.麻栎无性系对干旱胁迫的抗性研究[J].山东林业科技,2010(4):28-32.
[8]周贵臣.干旱半干旱地区抗旱造林技术的研究[J].农业与技术,2017,37(20):186-189.
[9]张宪政.植物生理学实验技术[M].沈阳:辽宁科学技术出版社,1989:89-133.
[10]李合生.植物生理生化实验原理和技术[M].北京:高等教育出版社,2001:258-260.
[11]上海植物生理学会.植物生理学实验手册[M].上海:科学技术出版社,1985:67-69.
[12]张志良,瞿伟菁.植物生理学实验指导[M].北京:高等教育出版社,2003:274-276.
[13]刘萍,李明军.植物生理学实验技术[M].北京:科学出版社,2007:125-127.
[14]张中峰,尤业明,黄玉清,等.模拟喀斯特生境条件下干旱胁迫对青冈栎苗木的影响[J].生态学报,2012,32(20):6318-6325.
[15]沙文沛,杜瑞卿,杨建伟,等.铅胁迫下香樟幼苗生理生化的变化及对铅的富集特征[J].江苏农业科学,2015,43(10):242-244.
[16]崔豫川,张文辉,王校锋.栓皮栎幼苗对土壤干旱胁迫的生理响应[J].西北植物学报,2013,33(2):364-370.