Plant Mol Biol (2017) 93:341–353 DOI 10.1007/s11103-016-0565-5 Transgenic citrus expressing synthesized cecropin B genes in the phloem exhibits decreased susceptibility to Huanglongbing 1,2 2,3 1,2 1,2 1,2 Xiuping Zou · Xueyou Jiang · Lanzhen Xu · Tiangang Lei · Aihong Peng · 1,2 1,2 1,2 Yongrui He · Lixiao Yao · Shanchun Chen Received: 10 July 2016 / Accepted: 14 November 2016 / Published online: 19 November 2016 © Springer Science+Business Media Dordrecht 2016 Abstract selected phloem-specific promoter GRP1.8, these con- Key message Expression of synthesized cecropin B structs were transferred into the citrus genome. All of the genes in the citrus phloem, where Candidatus Liberibac- cecropin B genes were efficiently expressed in the phloem ter asiaticus resides, significantly decreased host suscep‑ of transgenic plants. Over more than a year of evaluation, tibility to Huanglongbing. the transgenic lines exhibited reduced disease severity. Abstract Huanglongbing (HLB), associated with Candi- Bacterial populations in transgenic lines were significantly datus Liberibacter asiaticus bacteria, is the most destruc- lower than in the controls. Two lines, in which bacterial tive disease of citrus worldwide. All of the commercial populations were significantly lower than in others, showed sweet orange cultivars lack resistance to this disease. The no visible symptoms. Thus, we demonstrated the potential cationic lytic
Plant Molecular Biology – Springer Journals
Published: Nov 19, 2016
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