CHEN Xiaona,GAO Yong,DANG Xiaohong,et al.Effects of Paclobutrazol on Root Morphology of Hedysarum laeve Seedlings Under Saline-alkali Stress[J].Research of Soil and Water Conservation,2017,24(04):187-190.
植物延缓剂对盐碱胁迫下羊柴幼苗根系形态的影响
- Title:
- Effects of Paclobutrazol on Root Morphology of Hedysarum laeve Seedlings Under Saline-alkali Stress
- 分类号:
- S278
- 摘要:
- 应用盆栽控盐方法，通过模拟毛乌素沙地实际盐碱状况，研究不同质量浓度（0，150，300，450，600 mg/L）植物延缓剂（以多效唑为例）对盐碱处理（全盐量0.94 g/kg，处理时间3个月）下羊柴（Hedysarum laeve）根系形态特征的影响。结果表明：（1）盐碱胁迫会抑制羊柴根长的生长，降低根系与土壤结合面积及分支强度。其中，分叉数和交叉数所受的抑制作用最明显，分别较对照降低了77.54%，87.70%。（2）多效唑处理会促进羊柴根的生长，600 mg/L多效唑处理后羊柴根长、根尖数、分叉数、交叉数、根表面积、根体积分别较单独施盐处理增加了87.66%，116.62%，136.11%，302.25%，57.50%，31.33%，说明多效唑可以缓解羊柴的盐害作用。（3）综合考虑6项根系形态指标，质量浓度为600 mg/L的多效唑对提高羊柴耐盐性的效果最佳。
- Abstract:
- The pot experiment was conducted to study the effects of paclobutrazol with different concentrations(0 mg/L, 150 mg/L, 300 mg/L, 450 mg/L, 600 mg/L) on the root morphology of Hedysarum laeve under the saline-alkali stress (0.94 g/ kg total salt content) for three months. The results showed: (1) the root lengths were reduced, combined area between roots and soil and branching intensity were decreased under the saline-alkali stress. The forks and crossings were inhibited by 77.54% and 87.70%; (2) the application of paclobutrazol promoted the root growth, compared with single salt application, the root length, root tips, root forks, root crossings, root surface area and root volume increased by 87.66%, 116.62%, 136.11%, 302.25%, 57.50%, 31.33%, respectively, under 600 mg/L paclobutrazol treatment, which revealed that paclobutrazol application could release the salt stress on Hedysarum laeve; (3) considered the above six root morphology indexes, the improving effect of 600 mg/L paclobutrazol on salt tolerance of Hedysarum laeve was the best.
参考文献/References:
[1] 白冬梅,于智忠,李凤琴,等.内蒙古毛乌素沙地近年荒漠化动态研究[J].内蒙古环境科学,2008,20(1):68-73.
[2] 蔺娟,地里拜尔·苏力坦.土壤盐渍化的研究进展[J].新疆大学学报:自然科学版,2007,24(3):318-323,328.
[3] 尹勤瑞.盐碱化对土壤物理及水动力学性质的影响[D].陕西杨凌:西北农林科技大学,2011.
[4] 朱金方,刘京涛,陆兆华,等.盐胁迫对中国柽柳幼苗生理特性的影响[J].生态学报,2015,35(15):5140-5146.
[5] 周秀梅,李保印,汪家哲.多效唑在冷季型草坪上的应用效果[J].河南农业科学,2004(4):59-60.
[6] 王宇灵,白小明,罗仁峰,等.多效唑对多年生黑麦草扩展性和根系特性的影响[J].中国沙漠,2010,30(6):1319-1324.
[7] 毛轶清,陈健妙,郑青松,等.多效唑浸种对盐胁迫下麻疯树幼苗光合作用的影响[J].中国油料作物学报,2010,32(3):403-407.
[8] 陈兰,黄广远.多效唑对盐胁迫下高羊茅耐盐性的作用[J].草业科学,2009,26(8):177-180.
[9] 白小明,相斐,罗仁峰,等.多效唑对高羊茅扩展性和根系特性的调控效应[J].草业科学,2009,26(10):171-176.
[10] 张惠,张泽宁,刘姝玲.毛乌素沙地樟子松造林效果对土壤盐渍化程度的响应[J].西南林业大学学报,2016,36(1):44-48.
[11] 宋云民.毛乌素沙地主要树种水分特征及植被恢复模式研究[D].长沙:中南林业科技大学,2007.
[12] Wang G, Fahey T J, Xue S. Root morphology and architecture respond to N addition in Pinus tabuliformis, west China[J]. Oecologia, 2013,171(2):583-590.
[13] 姜琳琳,韩立思,韩晓日,等.氮素对玉米幼苗生长、根系形态及氮素吸收利用效率的影响[J].植物营养与肥料学报,2011,17(1):247-253.
[14] 郑慧玲,赵成章,徐婷,等.红砂根系分叉数和分支角度权衡关系的坡向差异[J].植物生态学报,2015,39(11):1062-1070.
[15] 姜慧敏,宝音陶格涛.黄花苜蓿根系生长特征研究[J].中国草地学报,2014,36(1):53-57.
[16] 王家顺,李志友.干旱胁迫对茶树根系形态特征的影响[J].河南农业科学,2011,40(9):55-57.
[17] 童辉,孙锦,郭世荣,等.等渗Ca(NO3)2和NaCl胁迫对黄瓜幼苗根系形态及活力的影响[J].南京农业大学学报,2012,35(3):37-41.
[18] 姚静,施卫明.盐胁迫对番茄根形态和幼苗生长的影响[J].土壤,2008,40(2):279-282.
[19] 杨敏,汪季,高君亮,等.植物生长延缓剂对盆栽柠条根系形态的影响[J].内蒙古农业大学学报:自然科学版,2011,32(2):300-304.
[20] 朱永友,王治.PP333复合剂对高羊茅生长发育和生理效应的影响[J].草业科学,2000,17(4):70-73.
[21] 杨文权,寇建村,刘勇,等.多效唑对2种冷季型草坪草生长的影响[J].草业科学,2008,25(11):117-119.
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备注/Memo
收稿日期:2017-02-15;改回日期:2017-03-06。
基金项目:948项目“人工调控荒漠灌丛生态空间构型技术引进”（2015-4-22）
通讯作者:高永(1962-),男,内蒙古包头人,教授,博士生导师,主要从事荒漠化防治研究。E-mail:13948815709@163.com