Type 2C Protein Phosphatases in Plant Signaling Pathways under Abiotic Stress

Chuong, Nguyen Nguyen; Nghia, Duong Hoang Trong; Thi, Van-Anh Le; Tran, Lam‐Son Phan; Hoang, Xuan Lan Thi; Thảo, Nguyễn Phương

doi:10.1007/978-3-030-48733-1_5

Cited by 1 publication

(1 citation statement)

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“…In this study, several ABA-related transcripts were identified such as bHLH95 (isotig57037 and unigene98089) ( Figure 7 B), a transcription factor involved in the regulation of abscisic acid biosynthesis [ 71 ], or PP2C (probable protein phosphatase 2C) proteins, such as PP2C03 (unigene146886 and isotig47726) ( Figure 7 A,F). PP2C proteins are one of the major families of protein phosphatases in plants that play important roles in different pathways regulating plant growth regulatory signaling pathways such as ABA, BR, and the MAPK cascade in plant response to abiotic stress [ 72 , 73 ]. ABA-mediated drought signaling is regulated by the ABAR-PP2C-SnRK2 module.…”

Section: Discussionmentioning

confidence: 99%

Maritime Pine Rootstock Genotype Modulates Gene Expression Associated with Stress Tolerance in Grafted Stems

Manjarrez,

Guevara,

de María

et al. 2024

Plants

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Climate change-induced hazards, such as drought, threaten forest resilience, particularly in vulnerable regions such as the Mediterranean Basin. Maritime pine (Pinus pinaster Aiton), a model species in Western Europe, plays a crucial role in the Mediterranean forest due to its genetic diversity and ecological plasticity. This study characterizes transcriptional profiles of scion and rootstock stems of four P. pinaster graft combinations grown under well-watered conditions. Our grafting scheme combined drought-sensitive and drought-tolerant genotypes for scions (GAL1056: drought-sensitive scion; and Oria6: drought-tolerant scion) and rootstocks (R1S: drought-sensitive rootstock; and R18T: drought-tolerant rootstock). Transcriptomic analysis revealed expression patterns shaped by genotype provenance and graft combination. The accumulation of differentially expressed genes (DEGs) encoding proteins, involved in defense mechanisms and pathogen recognition, was higher in drought-sensitive scion stems and also increased when grafted onto drought-sensitive rootstocks. DEGs involved in drought tolerance mechanisms were identified in drought-tolerant genotypes as well as in drought-sensitive scions grafted onto drought-tolerant rootstocks, suggesting their establishment prior to drought. These mechanisms were associated with ABA metabolism and signaling. They were also involved in the activation of the ROS-scavenging pathways, which included the regulation of flavonoid and terpenoid metabolisms. Our results reveal DEGs potentially associated with the conifer response to drought and point out differences in drought tolerance strategies. These findings suggest genetic trade-offs between pine growth and defense, which could be relevant in selecting more drought-tolerant Pinus pinaster trees.

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Section: Discussionmentioning

confidence: 99%