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Min Yang,Ying Qi,Jiani Liu,Penghua Gao,Feiyan Huang,Lei Yu,Hairu Chen 한국식물병리학회 2023 Plant Pathology Journal Vol.39 No.2
Soft rot is a widespread, catastrophic disease caused by Pectobacterium carotovorum subsp. carotovorum (Pcc) that severely damages the production of Amorphophallus spp. This study evaluated the rhizosphere bacterial and fungal communities in Pcc-infected and uninfected plants of two species of Amorphophallus, A. muelleri and A. konjac. Principal component analysis showed that the samples formed different clusters according to the Pcc infection status, indicating that Pcc infection can cause a large number of changes in the bacterial and fungal communities in the Amorphophallus spp. rhizosphere soil. However, the response mechanisms of A. muelleri and A. konjac are different. There was little difference in the overall microbial species composition among the four treatments, but the relative abundances of core microbiome members were significantly different. The relative abundances of Actinobacteria, Chloroflexi, Acidobacteria, Firmicutes, Bacillus, and Lysobacter were lower in infected A. konjac plants than in healthy plants; in contrast, those of infected A. muelleri plants were higher than those in healthy plants. For fungi, the relative abundances of Ascomycota and Fusarium in the rhizosphere of infected A. konjac plants were significantly higher than those of healthy plants, but those of infected A. muelleri plants were lower than those of healthy plants. The relative abundance of beneficial Penicillium fungi was lower in infected A. konjac plants than in healthy plants, and that of infected A. muelleri plants was higher than that of healthy plants. These findings can provide theoretical references for further functional research and utilization of Amorphophallus spp. rhizosphere microbial communities in the future.
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peng Hua,Gao Jiao,song Xia 한국식물생명공학회 2022 Plant biotechnology reports Vol.16 No.5
Chloroplast development together with chlorophyll biosynthesis plays an important role in plant survival and growth. Here, EMS-induced chlorophyll-deficient mutants (wtg, wts, and wta) were obtained from the progeny of Mt128 (MT), generated from the maize inbred line DP128 (WT). Three types of leaf color were segregated from the self-fertilized progenies of MT, including green, narrow-white striped and albino and named wtg, wts, and wta, respectively. We found that the Chl and carotenoid contents were significantly changed in wtg, wts, and wta, especially wta, compared with WT. In addition, leaf transcriptome sequencing of wtg, wts, wta, and WT were also carried out. The DEGs were identified as being related to chloroplast development and photosynthesis. By performing pairwise comparisons of each group, a total of 3685 (1181 upregulated, 2504 downregulated), 2624 (1028 upregulated, 1596 downregulated) and 6693 (3018 upregulated, 3675 downregulated) genes were found to be differentially regulated in wtg, wts, and wta, respectively, compared with WT. Of those, 75 comodulated DEGs with great alterations were identified among the comparison groups. More interestingly, most of the DEGs were found to be significantly involved in photosynthesis, including PSI, PSII, the cytochrome b6f complex, and F-type ATPase. GO enrichment of DEGs revealed that most of DEGs were involved in chloroplast development, chlorophyll biosynthesis, or photosynthesis. KEGG enrichment analysis indicated that the five significantly enriched pathways for comodulated DEGs in all EMS-induced mutant genotypes were as follows: benzoxazinoid biosynthesis, photosynthesis, starch and sucrose metabolism, phenylpropanoid biosynthesis and the photosynthesis–antenna proteins pathway. The results showed that EMS induction is a valid approach for generating mutants for crop breeding research.
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