title: [Tolerance of rice varieties to whitebacked planthopper Sogatella furcifera and variation of nutrient components in rice plants].
abstract: The study showed that the rice varieties N22, Luyuanzhan No. 1 and 94D-22 had a stronger tolerance to Sogatella furcifera, while Mudgo and K89-B5 had a weaker tolerance. The varieties Ptb33 and Zhongzu 74 were of antibiosis, and susceptible varieties Xiushui 11, Shanyou 63 and susceptible check varieties TN1 had no tolerance. After rice plants were infested by S. furcifera, the percentages of nitrogen content (N%) and soluble sugar content (S%) in tolerant varieties increased, but the ratio of nitrogen content to soluble sugar content (N/S) decreased obviously. For susceptible varieties, the variations of N%, S% and N/S were opposite to those of the tolerant varieties. In different varieties the contents of most kinds of free amino acid increased at various degrees, but those of alanine in susceptible variety TN1, alanine, threonine and methionine in tolerant varieties N22, and arginine in resistant variety Ptb33 decreased.
authors.affiliation: Institute of Plant Protection, Zhejiang Academy of Agricultural Sciences, Institute of Applied Entomology, Zhejiang University, Hangzhou, China. Chenjm63@yahoo.com.cn
authors.forename: Jianming
authors.initials: J
authors.lastname: Chen
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Yu
authors.forename: Zhongxian
authors.initials: Z
authors.lastname: Lü
authors.forename: Xusong
authors.initials: X
authors.lastname: Zheng
authors.forename: Hongxing
authors.initials: H
authors.lastname: Xu
authors.forename: Jia'an
authors.initials: J
authors.lastname: Cheng
authors.forename: Guangjie
authors.initials: G
authors.lastname: Liu
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000818:Animals; D002241:Carbohydrates / Q000032:analysis; D005260:Female; D006430:Hemiptera / Q000502:physiology*; D009584:Nitrogen / Q000032:analysis; D012275:Oryza / Q000737:chemistry / Q000469:parasitology*
chemical_list: D000596:Amino Acids; D002241:Carbohydrates; D009584:Nitrogen