李琪园 王晓斌 沈登锋 章建红 王世伟

摘 要：以2年生的‘贝尔奇卡金哈克勒雷冬青（Ilex×altaclerensis ′ Belgica Aurea′ ）扦插苗和2年生冬青（Ilex chinensis）实生苗为试验材料，在温室大棚内定期浇灌浓度为0.3%、0.4%、0.5%、0.6%、0.7%NaCl溶液进行盐胁迫，以浇清水为对照。通过测量植物的光合特性参数以及叶绿素荧光参数的变化，研究比较不同盐胁迫处理对二者的影响。结果显示：Nacl溶液处理后两种冬青属植物的净光合速率（Pn）、气孔导度（Gs）、胞间二氧化碳浓度（Ci）、蒸腾速率（Tr）均出现了下降;相同浓度盐胁迫处理下冬青的下降幅度更大;盐胁迫后‘贝尔奇卡金哈克勒雷冬青最大光化学效率（Fv/Fm）、光化学猝灭系数（qP）和非光化学猝灭系数（NPQ）的变化较冬青稳定，变化幅度小于冬青，表明在本试验中，‘贝尔奇卡金哈克勒雷冬青比冬青具有更高的耐盐特性，‘贝尔奇卡金哈克勒雷冬青对盐胁迫的最大盐耐受浓度为0.6%，冬青的盐胁迫耐受浓度为0.3%。

关键词：盐胁迫;哈克勒雷冬青;冬青;光合特性;叶绿素荧光

中图分类号：S793.9

文献标识码：A

文章编号：1008-0457（2021）02-0036-07

国际DOI编码：10.15958/j.cnki.sdnyswxb.2021.02.006

Abstract：Two-year-old Ilex×altaclerensis ‘Belgica Aurea cuttingsand Ilex chinensis seedlings were used as experimental materials，whichwerestressed bytheconcentrations of 0.3%，0.4%，0.5%，0.6% and 0.7% NaCl solutionin the greenhouse.The control was water.The effects of different salt stress treatments on the two plants were studied and comparedby measuring the changes of photosynthetic parameters and chlorophyll fluorescence parameters of plants.The results showed that thenet photosynthetic rate，stomatal conductance，intercellular CO2 concentration and transpirationrate of the two species decreased after being treated.The indexes of Ilex chinensis declined moregreatlythanIlex×altaclerensis′ Belgica Aurea′ under the same concentration of salt stress.The change ofthemaximum photochemical efficiency，photochemical quenching coefficient and non photochemical quenching coefficient of Ilex chinensis‘Belgica Aureawere smaller than those ofIlex×altaclerensis，In words，the salt tolerance of Ilex×altaclerensis′ Belgica Aurea′ was better than that of Ilex chinensis.The maximum salt tolerance concentration of Ilex×altaclerensis′ Belgica Aurea′ and Ilexchinensis was 0.6% and 0.3%，respectively.

Keywords：salt stress; Ilex×altaclerensis ‘Belgica Aurea;Ilex chinensis;photosynthetic characteristics;chlorophyll fluorescence

冬青屬（Ilex）植物多为常绿树种，冠形良好，叶片革质，有光泽，具有较高的观赏价值，尤其在冬季，其艳丽的果实挂满枝头别具一格，冬青作为园林栽培树种在世界范围内有广泛应用，构骨叶冬青（I.aquifolium）、北美冬青（Ilex verticillata）、哈克勒雷冬青（I.×altaclerensis）系列品种在欧美地区园林应用广泛[1-2]。为丰富冬青属植物在浙江地区的园林应用，通过引进国外种质，研究其生物学与生态学特性，筛选出适宜于在浙江滨海地区推广的种质，以期丰富园林植物的多样性，实现滨海盐碱地区的绿化美化。……