温度、盐分和光照对荒漠植物盐爪爪种子萌发特征的影响  

Effects of Temperature,Salinity and Light on Seed Germination Characteristics of Desert Plant Kalidium foliatum

作　　者：姜黎[1,3] 彭钼植 田长彦 JIANG Li;PENG Muzhi;TIAN Changyan(State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China;Graduate School of Chinese Academy of Sciences,Beijing 100039,China;Xinjiang Jinghe Desert Ecosystem Research Station,Jinghe Xinjiang 833300,China;Institute of Afforestation and Sand Control,Xinjiang Academy of Forestry Sciences,Urumqi 830063,China)

机构地区：[1]中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,乌鲁木齐830011 [2]中国科学院大学,北京100039 [3]新疆精河荒漠生态系统国家定位观测研究站,新疆精河833300 [4]新疆林科院造林治沙研究所,乌鲁木齐830063

出　　处：《种子》2022年第12期14-18,共5页Seed

基　　金：国家重点研发计划(2018 YFE 0207200);中国科学院西部之光“一带一路”团队项目(2019-YDYLTD-001);自治区公益性科研院所基本科研业务经费资助项目(KY 2021025)

摘　　要：为探索盐爪爪对荒漠干旱盐碱环境的适应性,研究了不同温度、不同盐分浓度及光照(光暗交替和全黑暗)处理对盐爪爪种子萌发的影响。结果表明,低温或高温能显著抑制盐爪爪种子萌发,种子萌发的适宜温度为30℃/15℃;在同一温度和光照条件下,盐爪爪种子的萌发率与萌发指数随着盐胁迫浓度增加呈现下降的趋势;温度和盐分对盐爪爪种子萌发存在交互作用,低温或高温均显著降低了盐爪爪种子萌发的耐盐性;在同一温度下,光暗交替与全黑暗条件下,种子萌发率有显著差异。在适宜温度下(30℃/15℃),光暗交替与全黑暗条件下种子耐盐临界值分别为393.6 mmol/L和259.0 mmol/L,极限值分别为664.7 mmol/L和403.3 mmol/L,光照能显著提高盐爪爪种子萌发时期的耐盐性。因此,温度和盐分可作为盐爪爪种子萌发时期主要限制生态因子,同时光照也可作为重要的调控生态因子。In order to explore the Kalidium foliatum adapting to desert arid saline alkali environment,the effects of different temperatures,salt concentrations and light(alternating light and dark and total darkness)on the germination of Kalidium foliatum seeds.The results showed that low temperature or high temperature could significantly inhibit the germination of K.foliatum seeds.The suitable temperature for seed germination was 25℃/10℃or 30℃/15℃;Under the same temperature and light,the germination rate and germination index of K.foliatum seeds decreased with the increase of salt stress concentration;There was interaction between temperature and salt on the germination of K.foliatum seeds.Low temperature or high temperature significantly reduced the salt tolerance of K.foliatum in seed germination period;At the same temperature,there was a significant difference in seed germination rate between light dark alternation and total darkness.At the appropriate temperature(30℃/15℃),the critical values of salt tolerance of alternating light and dark and all dark seeds were 393.6 mmol/L and 259.0 mmol/L,respectively,and the limit values were 664.7 mmol/L and 403.3 mmol/L,respectively.Light significantly improved the salt tolerance of K.foliatum seeds during germination.Therefore,temperature and salt could be used as the main ecological factors during seed germination,and light could also be used as severe ecological factors.

关 键 词：盐爪爪 盐分 温度 光照 种子萌发 

分 类 号：Q945.78[生物学—植物学]