1. Laboratory of Fruit Molecular Physiology and Biotechnology, Huajiachi Campus, Zhejiang University, Hangzhou 310029, Department of Horticulture, College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, and The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Biotechnology, Hangzhou 310029, People's Republic of China