亚适温和硝酸盐胁迫对黄瓜幼苗生长及镁吸收的影响

应用生态学报

亚适温和硝酸盐胁迫对黄瓜幼苗生长及镁吸收的影响

杨全勇¹,王秀峰^1,2**,韩宇睿¹,杨静静¹,魏珉^1,2,3,杨凤娟^1,2,史庆华^1,2,李岩¹

（¹山东农业大学园艺科学与工程学院，山东泰安 271018; ^2作物生物学国家重点实验室，山东泰安 271018； ^3农业部黄淮海设施农业工程科学观测实验站，山东泰安 271018）

出版日期:2015-05-18 发布日期:2015-05-18

Effects of NO₃^- stress on cucumber seedling growth and magnesium absorbing under suboptimal temperature.

YANG Quan-yong¹, WANG Xiu-feng^1,2, HAN Yu-rui¹, YANG Jing-jing¹, WEI Min^1,2,3, YANG Feng-juan^1,2, SHI Qing-hua^1,2, LI Yan^1

(¹College of Horticultural Science and Engineering, Shandong Agricultural University, Tai’an 271018, Shandong, China; ^2State Key Laboratory of Crop Biology, Tai’an 271018, Shandong, China; ³Scientific Observing and Experimental Station of Environment Controlled Agricultural Engineering in HuangHuaiHai Region, Ministry of Agriculture, Tai’an 271018, Shandong, China)

Online:2015-05-18 Published:2015-05-18

摘要/Abstract

摘要：

在亚适温条件（昼/夜18 ℃/12 ℃）下，研究硝酸盐胁迫1和14 d对黄瓜幼苗生长及镁吸收的影响.结果表明：亚适温条件下，硝酸盐胁迫对黄瓜幼苗生长产生显著抑制作用.与适温对照相比，其叶片的净光合速率、蒸腾速率、光系统Ⅱ最大光化学效率和实际光化学效率均明显下降；幼苗根、茎、叶中镁含量明显下降，尤以处理Ⅳ（亚适温+140 mmol·L^-1 NO₃^-+1 mmol·L^-1 Mg²⁺）最为显著；Mg²⁺对K⁺和Ca²⁺吸收有拮抗作用，增加营养液中的Mg²⁺浓度，可使黄瓜幼苗的缺镁症状得到缓解.

Abstract: The effects of NO₃^- stress on the growth and the magnesium absorption of cucumber seedlings were investigated after 1 and 14 d of suboptimal temperature
［18 ℃/12 ℃ (day/night)］ treatment. The results indicated that the growth, net photosynthetic rate, transpiration rate, F_v/F_m and Φ_PSII of cucumber seedlings were significantly inhibited by NO₃^- stress under suboptimal temperature. The magnesium content of cucumber seedlings was also significantly decreased compared with control treatment, especially in the Ⅳ treatment （suboptimal temperature +140 mmol·L^-1 NO₃^-+1 mmol·L^-1 Mg²⁺）, and the antagonistic impact of magnesium ion absorption on the absorption of potassium and calcium ion was observed. The magnesium deficiency symptom of cucumber seedlings could be partly alleviated by increasing the concentration of magnesium ion in the nutrient solution.

杨全勇1,王秀峰1,2**,韩宇睿1,杨静静1,魏珉1,2,3,杨凤娟1,2,史庆华1,2,李岩1. 亚适温和硝酸盐胁迫对黄瓜幼苗生长及镁吸收的影响[J]. 应用生态学报.

YANG Quan-yong1, WANG Xiu-feng1,2, HAN Yu-rui1, YANG Jing-jing1, WEI Min1,2,3, YANG Feng-juan 1,2, SHI Qing-hua1,2, LI Yan1. Effects of NO₃^- stress on cucumber seedling growth and magnesium absorbing under suboptimal temperature.[J]. Chinese Journal of Applied Ecology.