Abstract
Terpene synthase (TPS) is related to the production of aromatic substances, but there are few studies on the impact of abiotic stress on TPS and its molecular mechanism, especially in peaches. This study found that salt resistance and abscisic acid (ABA) sensitivity of transgenic tomatoes were enhanced by overexpression of PpTPS1. Moreover, it was found that PpTPS1 interacted with and antagonized the expression of the bZIP transcription factor ABA INSENSITIVE 5 (PpABI5), which is thought to play an important role in salt suitability. In addition, PpTCP1, PpTCP13, and PpTCP15 were found to activate the expression of PpTPS1 by yeast one-hybrid (Y1H) and dual-luciferase assays, and they could also be induced by ABA. In summary, PpTPS1 may be involved in the ABA signaling regulatory pathway and play an important role in salt acclimation, providing a new reference gene for the improvement of salt resistance in peaches.
Highlights
China is a prominent country in the global peach industry, and peach fruit tree cultivation is an important industry for improving the disposable income of the farmers (Deng et al, 2018)
The results showed PpTPS1 had the highest expression in fruit, followed by leaves, and the lowest expression was observed in flowers, indicating that PpTPS1 may be widely involved in a variety of physiological activities in plants (Figure 1A)
To initially explore whether PpTPS1 is induced by abiotic stress, we analyzed its expression pattern under exogenous abscisic acid (ABA), low-temperature, salt, and drought treatments
Summary
China is a prominent country in the global peach industry, and peach fruit tree cultivation is an important industry for improving the disposable income of the farmers (Deng et al, 2018). Salt damage is an important issue affecting the development of global agriculture in the 21st century, and the saline land area in China is as high as 99 million hm. With bioengineering and gene assembly technology techniques, genetic transformation of salt tolerance genes and molecular biomarker breeding have become important means of improving salt tolerance in plants (Sun et al, 2018). With this process, it has become important to screen excellent, salt-tolerance candidate genes and study their molecular regulatory networks (Nayyeripasand et al, 2021). Most plant TPSs have multiple substrates and exhibit catalytic activity, which is an important reason for the rich variety of terpenoids (Chen et al, 2011). Leesburg found that almost all TPSs have a conserved aspartic acid-rich
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