The invention relates to a peptide siderophore, comprising one or more N-nitroso-hydroxylamine ligands. In a preferred embodiment, the peptide siderophore comprises two side chains, each with a N-nitroso-hydroxylamine ligand, and a further side chain with one or more hydroxy carboxylic acid, hydroxamate, catecholate and/or salicylate ligands, wherein the siderophore is preferably cyclic. The invention further relates to a bacterial cell expressing a peptide siderophore of the invention and a composition comprising a peptide siderophore of the invention, for example in the form of its corresponding iron-complex, or bacteria of the invention. The invention further relates to a method for promoting plant growth, promoting root growth or development, improving stress tolerance in a plant and/or for increasing crop yields of a plant, and/or for delivering nitric oxide (NO) to a plant and/or for enhancing chlorophyll production in a plant by administering the peptide siderophore, bacteria expressing the peptide siderophore or a composition comprising the peptide siderophore to said plant.
本发明涉及一种肽类
铁载体,包括一个或多个N-亚硝基-
羟胺配体。在一种优选实施例中,该肽类
铁载体包括两个侧链,每个侧链都有一个N-亚硝基-
羟胺配体,以及另一个侧链,该侧链具有一个或多个羟基
羧酸、羟
肟酸、邻二
酚和/或
水杨酸配体,其中该
铁载体优选为环状。本发明还涉及一种表达该肽类
铁载体的细菌细胞和一种包含该肽类
铁载体的组合物,例如以其相应的
铁络合物形式或本发明的细菌。本发明还涉及一种通过向植物施加肽类
铁载体、表达该肽类
铁载体的细菌或包含该肽类
铁载体的组合物来促进植物生长、促进根生长或发育、提高植物的耐逆性和/或增加植物的产量的方法,以及/或通过向植物施加肽类
铁载体、表达该肽类
铁载体的细菌或包含该肽类
铁载体的组合物来传递
一氧化氮(NO)到植物和/或增强植物的叶绿素产生。