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An analysis of physiological index of differences in drought tolerance of tomato rootstock seedlings
Xuehui Yao,Rui Yang,Fukuan Zhao,Shaohui Wang,Changbao Li,Wenchao Zhao 한국식물학회 2016 Journal of Plant Biology Vol.59 No.4
Drought is one of the most limiting factors for plant growth and development. In this study, experiments were carried out on five tomato rootstocks were subjected to water withdrawal and re-watering. Two RKN (root-knot nematodes)-and drought-dual resistant rootstocks were identified according to phenotype, physiological and molecular indexes such as the leaf relative water content (LRWC), electrolyte leakage (EL), water loss of the leaf, proline content, and increased activities of antioxidant enzymes, including peroxidase (POD), ascorbate peroxidase (APX), glutathione reductase (GR), dehydroascorbate reductase (DHAR) and the transcript levels of drought stress marker genes. Further, we preliminarily investigated the mechanism underlying improved drought tolerance arising from grafting. These results will promote the application of these rootstocks in tomato production and provide new information on the mechanism of tomato grafting.
Xiaoman Li,Wenchao Zhao,Xiaoxuan Zhou,Jiaping Feng,Yingjian Gao,Xuehui Yao,Yang Liu,Jie Liu,Rui Yang,Fukuan Zhao,Shaohui Wang 한국원예학회 2017 Horticulture, Environment, and Biotechnology Vol.58 No.6
Root-knot nematodes (RKNs) (Meloidogyne spp.) are one of the most damaging crop pests and cause severeyield losses worldwide. Easier and more efficient methods are needed for assessing nematode infestations and hostplant resistance. In the present study, we combined toluidine blue staining and paraffin sectioning to observe theestablishment of giant cells (GCs; redifferentiated cells induced by nematode feeding) and the developmental status ofRKNs in tomato (Solanum lycopersicum). The number of RKNs was counted using a modified freeze-thaw countingmethod. Finally, three tomato lines with different levels of RKN resistance, but otherwise identical genetic backgrounds,were tested to verify the applicability of the combined method. The results suggested that using toluidine blue stainingcombined with paraffin sectioning and freeze-thaw counting accurately reflects the level of RKN resistance of tomato plants.