Cucurbit Genetics Cooperative Report 22:5-7 (article 3) 1999 Hongwen Cui Department of Horticulture, Northwestern Agricultural University, Yangling Shaanxi, 712100, P.R. China Yuxiang Yuan Institute of Horticulture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, P.R. China When plantelets grow in an environment of constant temperature, high humidity, low light intensity and sterile surroundings, they exhibit a […]