title: Vitreoscilla hemoglobin overexpression increases submergence tolerance in cabbage.
abstract: Agrobacterium tumefaciens was used to deliver the vhb gene into cabbage (Brassica oleracea var. Cabitata) cv. Xiaguang's parent line, 103. Using hypocotyls and cotyledon petioles as explants for infection, we obtained a transformation efficiency of 3-5% based on the number of transgenic shoots produced from the number of explants used for infection. Molecular analysis indicated that the vhb gene was stably integrated into the cabbage genome and that the vhb gene was expressed at the RNA level. Characterization of the vhb over-expressing transgenic plants revealed that transgenic seeds germinated faster than the wildtype controls. More importantly, the transgenic plants showed tolerance to a prolonged submergence treatment, suggesting that the vhb gene may provide an excellent tool for creation of submergence/flooding-tolerant cultivars of agriculturally important crops.
authors.affiliation: Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agri-biotechnology Research Center, Shanghai Academy of Agricultural Sciences, 2901 Beidi Road, Shanghai, 201106, People's Republic of China. lix17101@yahoo.com.cn
authors.forename: Xian
authors.initials: X
authors.lastname: Li
authors.forename: Ri-He
authors.initials: RH
authors.lastname: Peng
authors.forename: Hui-Qin
authors.initials: HQ
authors.lastname: Fan
authors.forename: Ai-Sheng
authors.initials: AS
authors.lastname: Xiong
authors.forename: Quan-Hong
authors.initials: QH
authors.lastname: Yao
authors.forename: Zong-Ming
authors.initials: ZM
authors.lastname: Cheng
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
mesh_terms: D000222:Adaptation, Physiological / Q000235:genetics*; D001426:Bacterial Proteins / Q000235:genetics* / Q000502:physiology; D015139:Blotting, Southern; D001937:Brassica / Q000235:genetics* / Q000502:physiology; D002734:Chlorophyll / Q000378:metabolism; D015870:Gene Expression; D005822:Genetic Vectors; D018525:Germination; D006454:Hemoglobins / Q000235:genetics* / Q000502:physiology; D030821:Plants, Genetically Modified; D016133:Polymerase Chain Reaction; D012038:Regeneration; D012639:Seeds; D014170:Transformation, Genetic; D054793:Truncated Hemoglobins; D020589:Vitreoscilla / Q000235:genetics*
chemical_list: D001426:Bacterial Proteins; D006454:Hemoglobins; D054793:Truncated Hemoglobins; C082613:hemoglobin protein, Vitreoscilla; D002734:Chlorophyll