A new genetic factor for root gravitropism in rice (Oryza sativa L.).
Root gravitropism is one of the important factors to determine root architecture. To understand the mechanism underlying root gravitropism, we isolated a rice (Xiushui63) mutant defective in root gravitropism, designated as gls1. Vertical sections of root caps revealed that gls1 mutant displayed normal distribution of amyloplast in the columella cells compared with the wild type. The gls1 mutant was less sensitive to 2,4-dichlorophenoxyacetic acid (2,4-D) and alpha-naphthaleneacetic acid (NAA) than the wild type. Genetic analysis indicated that the phenotype of gls1 mutant was caused by a single recessive mutation, which is mapped in a 255-kb region between RM16253 and CAPS1 on the short arm of chromosome 4.
Shi
Jiang-hua
JH
State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China.
Hao
Xi
X
Wu
Zhong-chang
ZC
Wu
Ping
P
D015084:2,4-Dichlorophenoxyacetic Acid / Q000494:pharmacology; D001483:Base Sequence; D002874:Chromosome Mapping; D032461:Chromosomes, Plant / Q000235:genetics; D018744:DNA, Plant / Q000235:genetics; D004351:Drug Resistance / Q000235:genetics; D017343:Genes, Plant; D005808:Genes, Recessive; D018522:Gravitropism / Q000235:genetics* / Q000502:physiology; D007210:Indoleacetic Acids / Q000494:pharmacology; D009154:Mutation; D009280:Naphthaleneacetic Acids / Q000494:pharmacology; D012275:Oryza / Q000187:drug effects / Q000235:genetics* / Q000254:growth & development* / Q000502:physiology; D010641:Phenotype; D010937:Plant Growth Regulators / Q000494:pharmacology; D018517:Plant Roots / Q000254:growth & development / Q000502:physiology
D018744:DNA, Plant; D007210:Indoleacetic Acids; D009280:Naphthaleneacetic Acids; D010937:Plant Growth Regulators; D015084:2,4-Dichlorophenoxyacetic Acid; C034182:1-naphthaleneacetic acid