Characteristic Analysis of Leaf Bulliform Cells in Maize Inbred Lines with Different Drought Tolerance
Six inbred lines of maize with different drought tolerance were used to investigate the drought toler-ance,characteristics of bulliform cells and the deformation of bulliform cells after drought stress.Meanwhile,the study was focus on revealing the characteristics of bulliform cell before and after drought stress in maize inbred lines with different tolerance to drought stress and exploring the mechanism of drought stress response of crops at cellular level.The results indicated that B73,PH4CV and HiC exhibited higher sensitivity to drought stress,with severe leaf crimping and wilting phenotype after drought treatment,while Mo 17 displayed stronger drought tolerance,followed by Zong31 and Z58.The results of bulliform cell sections showed that the number of bulliform cells clusters in leaf epidermis increased and the number of bulliform cells in each cell cluster decreased in inbred lines with higher drought tolerance.After treatment of drought,the bulliform cells were obviously deformed.And the degree of defor-mation of bulliform cells in inbred lines corresponded to the stress response characteristics such as drought toler-ance,leaf wilting degree,leaf surface temperature,tissue water content and malondialdehyde(MDA)accumulation,indicating that the bulliform cells in maize leaves played an important role in maize drought stress response.
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