摘要
为探讨土壤酸化与盐渍化对姜生长的影响,本文采用盆栽砂培方式,通过调节Hoagland营养液pH (6.0、4.0)及Na+(0、100 mmol·L-1)水平,模拟土壤酸化与盐胁迫环境,研究了酸、盐交互处理条件下姜植株各器官生长量、矿质元素(Na、K、Ca、Mg)含量和叶片渗调物质含量等的变化。结果表明,酸胁迫仅影响了姜地上茎叶的生长量,盐胁迫则显著抑制了姜地上及地下各器官的生长,但盐胁迫条件下较低的pH促进了姜植株的生长。盐胁迫可显著提高姜叶片中可溶性糖、可溶性蛋白和脯氨酸等渗调物质含量,增强脯氨酸合成相关酶Δ1-吡咯啉-5-羧酸合成酶(P5CS)和鸟氨酸转氨酶(OAT)活性,降低脯氨酸脱氢酶(ProDH)活性;但酸胁迫对渗调物质含量及P5CS、OAT和ProDH活性影响较小。盐胁迫条件下,姜各器官Na含量显著增加, K、Ca及Mg含量显著降低;酸胁迫则对相关离子含量无显著影响,但盐胁迫下较低的pH可以降低姜各器官Na含量,促进K、Ca及Mg等离子吸收,有利于维持离子渗透平衡,减轻盐胁迫对细胞膜的损伤。
In order to investigate the effects of soil acidification and salinization on the growth of ginger,this paper used potted sand culture to simulate soil acidification and salt stress environment by adjusting the pH(6.0,4.0)and Na+(0,100 mmol·L-1)levels of Hoagland nutrient solution,and study the changes of the content of mineral elements(Na,K,Ca and Mg)and osmotic substance in various organs of ginger under soil acidification and salt interaction stress.The results showed that acid stress only decreased the growth of ginger stems and leaves,and salt stress inhibited the growth of various organs aboveground and underground,but under salt stress,low pH could reduce the toxicity and promote growth of ginger.Salt stress could significantly increase the content of soluble sugar,soluble protein and proline in ginger leaves,enhance the proline synthesis related enzymesΔ1-pyrroline-5-carboxylic acid synthase(P5 CS)and ornithine aminotransferase(OAT)activity,and decrease proline dehydrogenase(ProDH)activity;but acid stress had slight effect on the content of osmotic substance and the activities of proline metabolite.Under salt stress,the content of Na in the organs of ginger increased significantly,and the contents of K,Ca and Mg decreased significantly.The acid stress had no significant effect on the related ion content,however,low pH could reduce the Na content in various organs of ginger,regulate the absorption of K,Ca and Mg,increase leaf penetration,maintain osmotic balance,and thus reduce salt damage to ginger.
作者
尹丰满
曹逼力
徐坤
YIN Feng-Man;CAO Bi-Li;XU Kun(College of Horticulture Science and Engineering,Shandong Agricultural University,Shandong Collaborative Innovation Center of Fruit&Vegetable Quality and Efficient Production,Key Laboratory of Biology and Genetic Improvement of Horticultural Crops in Huang-Huai Region,Ministry of Agriculture,Taian,Shandong 271018,China)
出处
《植物生理学报》
CAS
CSCD
北大核心
2019年第6期814-820,共7页
Plant Physiology Journal
基金
国家现代农业产业技术体系项目(CARS-24-A-09)
山东省“双一流”学科建设项目(SYL2017YSTD06)~~
关键词
姜
盐胁迫
酸化
矿质元素
渗调物质
ginger
salt stress
acid stress
mineral elements
osmotic substance
