CAJ | 학술논문

利用动态离子流检测技术分析稻瘟病菌侵染条件下感病和抗病水稻品种根系离子吸收规律,以探讨稻瘟病菌对水稻营养吸收的影响。研究发现感病水稻品种病症较明显,根系对 K＋吸收减少,H ＋由外流转为内流,Ca2＋吸收减少且呈现不稳定吸收特征；抗病水稻品种病症较轻,根系对 K＋、H ＋、Ca2＋吸收仅表现小幅下降。结果表明,在稻瘟病菌侵染后,抗病水稻品种仍保持较强的离子吸收能力,而感病水稻品种的离子吸收能力明显减弱,甚至出现离子流失。这可能是导致感病水稻品种根系营养吸收障碍的重要原因。
이용동태리자류검측기술분석도온병균침염조건하감병화항병수도품충근계리자흡수규률,이탐토도온병균대수도영양흡수적영향。연구발현감병수도품충병증교명현,근계대 K＋흡수감소,H ＋유외류전위내류,Ca2＋흡수감소차정현불은정흡수특정；항병수도품충병증교경,근계대 K＋、H ＋、Ca2＋흡수부표현소폭하강。결과표명,재도온병균침염후,항병수도품충잉보지교강적리자흡수능력,이감병수도품충적리자흡수능력명현감약,심지출현리자류실。저가능시도치감병수도품충근계영양흡수장애적중요원인。
The dynamic ion flux test technique was employed to analyze ion absorption by roots in susceptible and resistant rice varieties subjected to Magnaporthe oryzae infection,aiming to determine the effect of Magnaporthe oryzae infection on nutrient absorption in rice plants.The results showed that Magnaporthe oryzae infection caused more obvious disease symptom in susceptible variety and reduced K+ absorption,led to H + transition from efflux to influx,and reduced Ca2 + absorption with larger unstability in root.In contrast,the resistant rice variety showed moderate disease severity and was characterized by only a slight decrease in absorption of K+ ,H + ,and Ca2 + ions by the roots.These results indicated that subjected to Magnaporthe oryzae infection,resistant rice variety showed stronger ion absorption capacity,while the susceptible rice variety exhibited weaker capacity,which could be an important reason leading to the barrier of nutrients absorption in the roots of susceptible rice variety.