Evaluation of Seedling Stage Salt-tolerance Indexes of Tomato Variety and Rootstock and Screening of Salt-tolerant Varieties
WANG Yi1，MEN Li-zhi1，CAO Yun-e1，HUANG Jian2，GAO Li-hong1，TIAN Yong-qiang1，CHEN Qing-yun1*
（1College of Agronomy & Biotechnology，China Agricultural University，Beijing Key Laboratory of Growth and Development Regulation for Protected Vegetable Crops，Beijing 100193，China；2Beijing Production and Marketing Service Station for Superiors Agricultural Products，Beijing 100101，China）
Abstract：In order to screen salt-tolerant tomato（ Lycopersicon esculentum Mill．） and rootstock varieties，to determine the salt concentration adaptable by tomato seedlings，and to identify the intensity and the reliable salt-tolerance indexes of tomato seedlings，this study investigated the salt-tolerance of 19 tomato cultivars and 3 rootstock varieties at the seedling stage，tested and analyzed the relevant index．The result showed that the‘Jiaxina’（Netherland varieties，cherry tomato，red in color） and‘Guilijuefen’（Gansu varieties，large fruit，pink in color） were salt-tolerant cultivars，while‘ Fanqiezhenmu 406’（Shandong varieties，large fruit，red in color） was salt-tolerant tomato rootstock cultivar．Under 2-days interval irrigation condition，the intensity of salt concentration adaptable by tomato seedlings 4 g·L-1 and 8 g·L-1．The reliable identification indexes of salt-tolerance were plant dry mass，shoot dry mass，root dry mass，plant height，stem diameter，fuctional leaves and seedling index．However，the root shoot ratio could not an identification index of tomato salt-tolerance．
