The Hevea brasiliensis AP2/ERF superfamily: from ethylene signalling to latex harvesting and physiological disease response

Abstract

Abstrak Etilen merupakan hormon yang dikenal karena perannya dalam proses penyadapan lateks di tanaman karet (Hevea brasiliensis)

Downregulation of HbFPS1 affects rubber biosynthesis of Hevea brasiliensis suffering from tapping panel dryness

“…These DEGs and DAPs were significantly enriched in 28 KEGG pathways, which were mainly related to energy metabolism, carbohydrate metabolism, lipid metabolism, ROS scavenging, PCD, and signal transduction/information processing (Figure 2c ; Table S4 ). Thus, it can be concluded that TPD affects energy, carbohydrate, and lipid metabolism, as well as ROS scavenging, PCD, and signal transduction/information processing, which is consistent with the physiological parameters of latex from healthy and TPD‐affected trees and in agreement with previous studies (Chen et al., 2003 ; de Faÿ, 2011 ; Li et al., 2010 , 2016 ; Peng et al., 2011 ; Putranto & Montoro, 2016 ; Venkatachalam et al., 2009 ; Zhang et al., 2017 ). Notably, the correlation between DEGs and DAPs was very poor ( r = 0.024 in T2_H and r = 0.104 in T4_H), indicating that the protein abundance in the latex of TPD‐affected trees may be significantly affected by post‐translational modifications and splicing events (Pandey & Mann, 2000 ).…”

“…TPD seriously affects the NR yield and quality of rubber trees (Putranto & Montoro, 2016 ; Zhang et al., 2017 ). Previous studies investigated the molecular mechanisms of TPD using suppression subtractive hybridization and transcriptome sequencing analysis (Li et al., 2010 , 2016 ; Liu et al., 2015 ).…”

“…HbEREBP1 belongs to the APETALA2/ethylene response factor (AP2/ERF) superfamily, whose members are critical in plant ET signal transduction. Several AP2/ERF members are highly accumulated in laticifers and produced in response to ET stimulation (Nie et al., 2016 ; Putranto & Montoro, 2016 ). In the present study, both RNA‐seq and RT‐qPCR assays showed no expression differences of HbEREBP1 in the latex between TPD‐affected trees and healthy trees, suggesting that HbEREBP1 may not be involved in HbFPS1 downregulation in TPD‐affected trees.…”