PARTIAL CLONING AND IDENTIFICATION OF TERPENE SYNTHASE-6 GENE (TPS-6) IN AN AROMATIC PLANT Origanum onites L.

Poyraz, İsmail; Sağlam, Merve Kocagül

doi:10.23902/trkjnat.291972

Cited by 1 publication

(1 citation statement)

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“…As shown in Table 3 , BcD1 upregulated seven members of berberine bridge enzyme (BBE)-like and caffeoyl-CoA O-methyltransferase ( CCOAMT ), both of which are involved in the synthesis of lignin [ 98 , 99 ]. The upregulated genes identified in this study were involved in the synthesis of terpenoids, such as terpene synthase 04 ( TPS4 ), MARNERAL SYNTHASE 1 ( MRN1 ), and thalianol synthase ( AtTHAS1 ) [ 100 , 101 , 102 ]. BcD1 treatment increase expression of genes, including CYP71A12 and senescence-associated protein 13 ( SAG13 ), which are participated in the synthesis of alkaloid [ 103 , 104 ].…”

Section: Resultsmentioning

confidence: 99%

Exploring the Biologically Active Metabolites Produced by Bacillus cereus for Plant Growth Promotion, Heat Stress Tolerance, and Resistance to Bacterial Soft Rot in Arabidopsis

et al. 2023

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Eight gene clusters responsible for synthesizing bioactive metabolites associated with plant growth promotion were identified in the Bacillus cereus strain D1 (BcD1) genome using the de novo whole-genome assembly method. The two largest gene clusters were responsible for synthesizing volatile organic compounds (VOCs) and encoding extracellular serine proteases. The treatment with BcD1 resulted in an increase in leaf chlorophyll content, plant size, and fresh weight in Arabidopsis seedlings. The BcD1-treated seedlings also accumulated higher levels of lignin and secondary metabolites including glucosinolates, triterpenoids, flavonoids, and phenolic compounds. Antioxidant enzyme activity and DPPH radical scavenging activity were also found to be higher in the treated seedlings as compared with the control. Seedlings pretreated with BcD1 exhibited increased tolerance to heat stress and reduced disease incidence of bacterial soft rot. RNA-seq analysis showed that BcD1 treatment activated Arabidopsis genes for diverse metabolite synthesis, including lignin and glucosinolates, and pathogenesis-related proteins such as serine protease inhibitors and defensin/PDF family proteins. The genes responsible for synthesizing indole acetic acid (IAA), abscisic acid (ABA), and jasmonic acid (JA) were expressed at higher levels, along with WRKY transcription factors involved in stress regulation and MYB54 for secondary cell wall synthesis. This study found that BcD1, a rhizobacterium producing VOCs and serine proteases, is capable of triggering the synthesis of diverse secondary metabolites and antioxidant enzymes in plants as a defense strategy against heat stress and pathogen attack.

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