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A CRISPR/Cas9 deletion into the phosphate transporter SlPHO1;1 reveals its role in phosphate nutrition of tomato seedlings
Author(s) -
Zhao Panfeng,
You Qiuye,
Lei Mingguang
Publication year - 2019
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/ppl.12897
Subject(s) - biology , shoot , mutant , arabidopsis , gene , botany , genetics , crispr , phosphate , biochemistry
In vascular ( Arabidopsis thaliana ) and non‐vascular ( Physcomitrella patens ) plants, PHOSPHATE 1 (PHO1) homologs play important roles in the acquisition and transfer of phosphate. The tomato genome contains six genes ( SlPHO1;1 ‐ SlPHO1;6 ) homologous to AtPHO1 . The six proteins have typical characteristics of the plant PHO1 family, such as the three Syg1/Pho81/XPRI (SPX) subdomains in the N‐terminal portion and one ERD1/XPR1/SYG1 (EXS) domain in the C‐terminal portion. Phylogenetic analysis revealed that the SlPHO1 family is subdivided into three clusters. A pairwise comparison indicated that SlPHO1;1 showed the highest level of sequence identity/similarity (67.39/76.21%) to AtPHO1. SlPHO1;1 deletion mutants induced by clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9 displayed typical phenotypes of Pi starvation, such as decreased shoot fresh weight and increased root fresh weight, therefore having a greater root‐to‐shoot ratio. Mutants also accumulated more anthocyanin and had more soluble Pi content in the root and less in the shoot. These results indicate that SlPHO1;1 plays an important role in Pi transport in the tomato at seedling stage.

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