不同品种冬小麦苗期叶绿素荧光参数与抗旱性关系研究

doi:10.7668/hbnxb.20191258

摘要/Abstract

摘要： 为了探寻快速高效筛选冬小麦抗旱品种的方法，给冬小麦抗旱品种筛选提供参考依据，以烟农999、泰麦1918、济麦22号、济麦23号、泰山27和师栾02-1 6个冬小麦品种为供试材料，设置正常水分处理（土壤相对含水量75%）、轻微干旱处理（土壤相对含水量55%）和中度干旱处理（土壤相对含水量40%），研究了苗期叶绿素荧光参数、生物量、根冠比、SPAD、超氧化物歧化酶（SOD）活性和丙二醛（MDA）含量及其之间相关关系。结果表明：与其他冬小麦品种相比，干旱胁迫下，泰麦1918的抗旱系数（DTC）最大，根冠比降低程度最小，SPAD值、光系统Ⅱ最大光合效率（Fv/Fm）、光系统Ⅱ实际光合效率（φPSⅡ）和相对电子传递速率（ETR）的降低程度最小，SOD活性的降低程度最小，非光化学淬灭（NPQ）升高程度最大，丙二醛含量升高程度最小。6个供试冬小麦品种的抗旱性强弱依次为泰麦1918 > 烟农999 > 济麦22号 > 济麦23号 > 泰山27 > 师栾02-1。通过相关性分析发现，叶绿素荧光参数与抗旱系数、SOD活性以及MDA含量的相关性均达到极显著水平。综上，供试材料中泰麦1918的抗旱性最强，叶绿素荧光参数可作为在苗期筛选冬小麦抗旱性品种的重要依据。

关键词: 冬小麦, 抗旱性, 叶绿素荧光, 苗期, 品种筛选

Abstract: In order to explore a fast and efficient way to screen drought-resistant varieties of winter wheat, and to select drought-resistant winter wheat varieties. Six winter wheat varieties, Yannong 999, Taimai 1918, Jimai 22, Jimai 23, Taishan 27 and Shiluan 02-1 were used in this study. Normal water treatment(75% relative soil water content), mild drought treatment(55% relative soil water content) and moderate drought treatment(40% relative soil water content) were arranged to explore the chlorophyll fluorescence parameters, biomass, root-shoot ratio, SPAD, superoxide dismutase(SOD) activity, malondialdehyde(MDA) content and their correlations. Results showed that, compared with other varieties, under drought stress, Taimai 1918 obtained the highest drought resistance coefficient(DTC). The smallest reduction of root to shoot ratio, SPAD value, photosystem Ⅱ maximum photosynthetic efficiency(Fv/Fm), photosystem Ⅱ actual photosynthesis efficiency(φPSⅡ), relative electron transfer rate(ETR), SOD, and the largest increasing in non-photochemical quenching(NPQ) and minimal increasing in MDA content were observed in Taimai 1918. The order of drought resistance of 6 winter wheat varieties was Taimai 1918 > Yannong 999 > Jimai 22 > Jimai 23 > Taishan 27 > Shiluan 02-1. The chlorophyll fluorescence parameters were significantly correlated with drought resistance coefficient, SOD activity and MDA content. Sum up, the drought resistance in Taimai 1918 was strongest, and chlorophyll fluorescence parameters can be used for screening drought-resistant winter wheat varieties at seedling stage.

Key words: Winter wheat, Drought resistance, Chlorophyll fluorescence, Seedling stage, Variety screening

中图分类号:

S512.01

吴姗姗, 徐学欣, 张霞, 盖红梅, 赵长星, 王维华, 石岩, 战园. 不同品种冬小麦苗期叶绿素荧光参数与抗旱性关系研究[J]. 华北农学报, 2020, 35(6): 90-99. doi: 10.7668/hbnxb.20191258.

WU Shanshan, XU Xuexin, ZHANG Xia, GE Hongmei, ZHAO Changxing, WANG Weihua, SHI Yan, ZHAN Yuan. Relationship Analysis of Chlorophyll Fluorescence Parameters and Drought Resistance in Different Winter Wheat Varieties at Seedling Stage[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(6): 90-99. doi: 10.7668/hbnxb.20191258.

http://www.hbnxb.net/CN/Y2020/V35/I6/90

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