The study found that the transferable signal of tweeds improved the salt resistance of the host

Recently, a team led by Wu Jianqiang, a researcher at
Kunming Plant Institute, studied the effect of systematic signals induced by the transport of salt stress between hosts by tweeds on host salt resistance, and the results were published online in the Journal of Experimental Botany.
silk is a stem parasitic plant of the genus of spindle silk, which can connect two or more adjacent hosts at the same time, forming a natural group of plants connected by silk. Salt stress is the main factor affecting plant growth in nature, which seriously affects the yield of crops. Whether the tweed can transmit the systematic signal induced by salt stress between different hosts, and has a regulatory effect on the host's physiology, so that it has a stronger salt stress adaptability is not studied.
researchers connected two different cucumber hosts through a silk tweed and salted one of them. The experimental results show that the systemic signal generated by the salt stress-induced host is transferred to another host through the tweed, and affects the transcription level and physiological state of the host. The anti-salt systemic signal conducted by the tweeds gives the host receiving this signal a similar transcription level to the host under salt stress, and the host receiving the salt stress signal also exhibits higher proline content and photolycing rate, which indicate that the systemic signal induced by salt stress is transported through the tweed.
, the team performed a long-term salt stress treatment on the hosts that received the salt stress signal, and the results showed that the hosts that received the salt stress signal showed better salt resistance than the hosts that did not receive the salt stress signal. This study reveals for the first time that tweeds can mediate systemic signals induced by abscessive stress between different hosts, and has made an in-depth study of the physiological function of systemic signals of salt stress, which provides a new perspective for understanding the physiological ecological function of tweeds and the systematic signals of salt stress. In addition, the study used tweeds to connect different hosts, a natural grafting system that provides a new research platform for the study of systemic signals.
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