期刊文献+

干旱胁迫下不同来源多根葱根系及叶片光合特性的比较 被引量:4

Comparative Study on Root and Leaf Photosynthesis of Allium polyrhizum from Different Sources under Drought Stress
下载PDF
导出
摘要 为明确内蒙古草原多根葱的抗旱性及抗旱机制。采用盆栽控水法,设置最大田间持水量的75%为对照(CK),25%土壤相对含水量干旱胁迫30 d为处理,在干旱胁迫下对不同来源多根葱根系形态、生理特性及叶片光合特征进行分析。结果表明,四子王旗多根葱在干旱胁迫下与赤峰、鄂尔多斯相比,保持相对较高的根系表面积、根系体积和直径为0~0.5 mm的根长,根系生长受到干旱胁迫的影响相对较小,叶绿体在干旱胁迫下的稳定性相对较好,抗旱性较强;干旱胁迫显著降低了赤峰、鄂尔多斯多根葱地上生物量、地下生物量和总生物量(P<0.05),但对四子王旗多根葱无显著影响(P>0.05)。干旱胁迫处理下多根葱叶片光合速率、蒸腾速率、气孔导度、胞间CO_(2)浓度和相对含水量显著下降,叶片细胞质膜相对透性显著上升;干旱胁迫促进了多根葱叶片气孔关闭,降低了蒸腾,减少水分的散失。不同样地多根葱根系特征、相对含水量、叶绿素和光合特性在相同处理下存在一定的差异;四子王旗多根葱受干旱胁迫的影响相对较小,耐旱性较强。 In order to clarify the drought resistance and drought resistance mechanism of Allium polyrhizum in Inner Mongolia grassland,potted water control method was adopted.Two gradients were set,75%of the maximum field water capacity as the control(CK),and 25%of the soil relative water content under 30 days of drought stress.The root morphology,physiological characteristics and leaf photosynthetic characteristics of Allium polyrhizum from different sources were analyzed under drought stress.The result showed that Allium polyrhizum in Siziwang Banner compared with the Chifeng and Ordos was remaining relatively high root surface area,root volume and root length 0-0.5 mm in diameter.Allium polyrhizum root growth was relatively less affected by drought stress,chloroplasts were relatively stable and strong drought resistance in Siziwang Banner.Drought stress significantly decreased the above ground biomass,below ground biomass and total biomass of Allium polyrhizum in Chifeng and Ordos,but had no significant effects on Siziwang Banner(P>0.05).The Pn,Tr,Gs,Ci and leaves relative water content of Allium polyrhizum seedlings were significantly decreased and the relative permeability of cytoplasmic membrane was markedly increased under the whole drought stress treatment.Drought stress induced stomatal closure of Allium polyrhizum leaves and reduced transpiration to decrease water loss.The root characteristics,relative water content,chlorophyll and photosynthetic characteristics of Allium polyrhizum in different sources were certain differences under the same treatment.In general,the effect of drought stress on Allium polyrhizum in Siziwang Banner was relatively weak,it was indicating stronger drought tolerance.
作者 包秀霞 廉勇 慕宗杰 张欢 BAO Xiuxia;LIAN Yong;MU Zongjie;ZHANG Huan(College of Chemistry and Environment,Hohhot Minzu College,Hohhot 010051,China;Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China)
出处 《华北农学报》 CSCD 北大核心 2022年第4期122-127,共6页 Acta Agriculturae Boreali-Sinica
基金 中央引导地方科技发展资金项目(2021ZY0029) 呼和浩特民族学院博士专项基金项目(HMBS1702)。
关键词 多根葱 干旱胁迫 根系生长 光合特性 Allium polyrhizum Drought stress Root growth Photosynthesis characteristics
  • 相关文献

参考文献7

二级参考文献143

共引文献496

同被引文献76

引证文献4

二级引证文献11

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部