HAN Zhiping,GUO Shirong,WANG Qichuan.Effect of Salinity on the Growth of Mini-watermelon Seedlings[J].Northern Horticulture,2016,40(07):13-16.[doi:10.11937/bfyy.201607004]
盐胁迫对小型西瓜幼苗生长的影响
- Title:
- Effect of Salinity on the Growth of Mini-watermelon Seedlings
- Keywords:
- mini-watermelon; salinity; seedling growth; salt injury index
- 文献标志码:
- A
- 摘要:
- 以“秀雅”和“秀丽”不同小型西瓜品种为试材，采用营养液培养法，研究了不同浓度NaCl胁迫对耐盐性不同的2个品种小型西瓜幼苗生长的影响。结果表明：50 mmol/L浓度以下NaCl胁迫对“秀雅”幼苗生长没有明显影响，75 mmol/L浓度以上NaCl胁迫则显著抑制其生长；“秀丽”幼苗生长则随NaCl胁迫浓度提高而显著降低。在75 mmol/L浓度以上，随NaCl胁迫浓度的提高和胁迫时间的延长，幼苗盐害指数显著增大，存活株率则显著降低，且同一时间、相同浓度NaCl胁迫下，“秀雅”幼苗盐害指数低于“秀丽”，而存活株率高于“秀丽”。说明NaCl胁迫严重抑制了小型西瓜幼苗的生长，但2个品种对盐胁迫的反应存在明显差异，“秀雅”幼苗在盐胁迫下生长降低幅度较小、盐害指数较低而存活株率较高，对盐胁迫的适应性较强。
- Abstract:
- Different mini-watermelon varieties of ‘Xiuya’and ‘Xiuli’ were used as materials，two mini-watermelon cultivars differing in salt tolerance were conducted to study the effect of different concentration of NaCl stress on the growth of mini-watermelon seedlings in hydroponically.The results showed that NaCl treatments below 50 mmol/L didn’t apparently influence the growth of ‘Xiuya’ seedlings，its growth was significantly inhibited above 75 mmol/L；with increasing NaCl concentration，the growth of ‘Xiuli’ seedlilngs was significantly reduced.With increasing NaCl concentration and prolonging stress time，salt injury index was clearly increased，and survival percent was dramatically decreased under NaCl stress above 75 mmol/L.The research revealed that NaCl stress significantly inhibited the growth of mini-watermelon seedlings，but the response of two cultivars to salinity was different，the range of growth reduction of ‘Xiuya’ seedlings was less，salt injury index was lower and survival percent was higher than ‘Xiuli’ under salinity，i.e.the acclimation of ‘Xiuya’ to salinity was better than ‘Xiuli’.
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备注/Memo
第一作者简介：韩志平（1976-），男，山西盂县人，博士，副教授，研究方向为园艺植物逆境生理与分子生物学。E-mail：hanzhiping0215@〖JP3〗163.com.责任作者：郭世荣（1958-），男，山西平陆人，教授，博士生导师，现主要从事蔬菜生理与设施园艺等研究工作。E-mail：srguo@njau.edu.cn.基金项目：国家科技支撑资助项目（2013BAD20B05）；现代农业产业技术体系建设专项资金资助项目（CARS-25-C-03）；江苏省科技成果转化专项资金资助项目（BA2014147)；江苏省农业三新工程资助项目（SXGC[2013]331，SXGC[2014]256）。