Evaluation of waterlogging tolerance with the degree of foliar senescence at early vegetative stage of maize (<Emphasis Type="Italic">Zea mays</Emphasis> L.) |
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| Authors: | Seonghyu Shin Seong-Guk Kim Gun-Ho Jung Chung-Guk Kim Beom-Young Son Jeong Tae Kim Sang Gon Kim Woonho Yang Youngup Kwon Kang-Bo Shim Mi-Ok Woo |
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| Institution: | 1.Department of Central Area Crop Science,National Institute of Crop Science, Rural Development Administration,Suwon, Gyeonggi,Republic of Korea;2.Department of Plant Science,Seoul National University,Seoul,Republic of Korea |
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| Abstract: | Maize is highly susceptible to waterlogging, which is becoming one of worldwide abiotic threats in many agricultural areas. This study was evaluated to establish the screening method and to find tolerant maize genotypes. Six Korean maize inbred lines were subjected to waterlogging at V3 for 15 days using a big size pot with single maize plant (big pot method) and a box containing 31 maize plants at a time (box method). The degree of foliar senescence and the number of senescent leaves were better indicators for selecting waterlogging tolerant maize genotypes than SPAD value and plant height. The degree of foliar senescence revealed that KS124, KS140, and KS141 are tolerant, and KS85 is susceptible to waterlogging at the early growth stage. These responses of foliar senescence were in clear accordance with those of plant grain yield, which was supported by stress tolerance index for grain yield. The box method also showed the similar response of foliar senescence to the big pot method. Therefore, this box method based on foliar senescence may be simple and efficient for large-scale screening of maize germplasm against waterlogging stress. It was concluded that foliar senescence can be a good indicator for selecting tolerant maize genotypes against waterlogging at the early growth stage. |
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