Products of plant resistance ( R ) genes Pto and Cf contain distinct domains, and have different cellular localization. It is intriguing to compare the development mechanisms of resistance conferred by the t...Products of plant resistance ( R ) genes Pto and Cf contain distinct domains, and have different cellular localization. It is intriguing to compare the development mechanisms of resistance conferred by the two R genes. In the present report, two hypersensitive response (HR) initiation systems were employed to study the time_course expression induced by Avr / Cf interaction of the genes encoding Pti4, Pti5 and Pti6 which interact directly with Pto: (1) Seeds of tomato (Lycopersicon esculentum Mill.) containing complementary gene pairs Avr 4/ Cf _4 and Avr 9/ Cf _9 were obtained through crossing. Their seedlings developed HR under room temperature. (2) Avr / Cf seedlings grew normally at 33 ℃. When the temperature was shifted down to 25 ℃, HR occurred within hours in the seedlings. Results of both experiments showed that expression of Pti4, Pti5 and Pti6 was induced upon development of hypersensitive necrosis in Avr / Cf seedlings. However, the expression levels and patterns of these Pti s differed. This finding indicated that these Pti s function complementarily, and might be involved in regulation of both Pto and Cf _conferred resistance.展开更多
病原体相关性免疫(PTI)和获得性免疫(ETI)是植物免疫系统的两种主要防御机制。不同因素引发不同的植物免疫过程。同时,PTI和ETI并非完全独立的两个系统,RLCKs在这两种免疫途径中发挥调控作用。植物免疫是一个动态平衡的过程,植物通过不...病原体相关性免疫(PTI)和获得性免疫(ETI)是植物免疫系统的两种主要防御机制。不同因素引发不同的植物免疫过程。同时,PTI和ETI并非完全独立的两个系统,RLCKs在这两种免疫途径中发挥调控作用。植物免疫是一个动态平衡的过程,植物通过不断调整免疫策略来应对病原体挑战。Pathogen-associated immunity (PTI) and effector-triggered immunity (ETI) are two primary defense mechanisms in the plant immune system. Various factors trigger different plant immune processes. Moreover, PTI and ETI are not entirely independent systems;receptor-like cytoplasmic kinases (RLCKs) play a regulatory role in both immune pathways. Plant immunity is a dynamic balancing process, where plants continuously adjust their immune strategies to respond to pathogenic challenges.展开更多
文摘Products of plant resistance ( R ) genes Pto and Cf contain distinct domains, and have different cellular localization. It is intriguing to compare the development mechanisms of resistance conferred by the two R genes. In the present report, two hypersensitive response (HR) initiation systems were employed to study the time_course expression induced by Avr / Cf interaction of the genes encoding Pti4, Pti5 and Pti6 which interact directly with Pto: (1) Seeds of tomato (Lycopersicon esculentum Mill.) containing complementary gene pairs Avr 4/ Cf _4 and Avr 9/ Cf _9 were obtained through crossing. Their seedlings developed HR under room temperature. (2) Avr / Cf seedlings grew normally at 33 ℃. When the temperature was shifted down to 25 ℃, HR occurred within hours in the seedlings. Results of both experiments showed that expression of Pti4, Pti5 and Pti6 was induced upon development of hypersensitive necrosis in Avr / Cf seedlings. However, the expression levels and patterns of these Pti s differed. This finding indicated that these Pti s function complementarily, and might be involved in regulation of both Pto and Cf _conferred resistance.
文摘病原体相关性免疫(PTI)和获得性免疫(ETI)是植物免疫系统的两种主要防御机制。不同因素引发不同的植物免疫过程。同时,PTI和ETI并非完全独立的两个系统,RLCKs在这两种免疫途径中发挥调控作用。植物免疫是一个动态平衡的过程,植物通过不断调整免疫策略来应对病原体挑战。Pathogen-associated immunity (PTI) and effector-triggered immunity (ETI) are two primary defense mechanisms in the plant immune system. Various factors trigger different plant immune processes. Moreover, PTI and ETI are not entirely independent systems;receptor-like cytoplasmic kinases (RLCKs) play a regulatory role in both immune pathways. Plant immunity is a dynamic balancing process, where plants continuously adjust their immune strategies to respond to pathogenic challenges.
