Strigolactones Modulate Salicylic Acid-Mediated Disease Resistance in Arabidopsis thaliana

被引：22

作者：

Kusajima, Miyuki ^{[1
,2
]}

Fujita, Moeka ^{[2
]}

Soudthedlath, Khamsalath ^{[3
]}

Nakamura, Hidemitsu ^{[1
]}

Yoneyama, Koichi ^{[4
]}

Nomura, Takahito ^{[4
]}

Akiyama, Kohki ^{[5
]}

Maruyama-Nakashita, Akiko ^{[3
]}

Asami, Tadao ^{[1
]}

Nakashita, Hideo ^{[2
]}

机构：

[1] Univ Tokyo, Grad Sch Agr & Life Sci, Tokyo 1138657, Japan

[2] Fukui Prefectural Univ, Dept Biosci & Biotechnol, Fukui 9101195, Japan

[3] Kyushu Univ, Grad Sch Bioresource & Bioenvironm Sci, Fukuoka 8190395, Japan

[4] Utsunomiya Univ, Ctr Biosci Res & Educ, Utsunomiya, Tochigi 3218505, Japan

[5] Osaka Prefecture Univ, Grad Sch Life & Environm Sci, Osaka 5998531, Japan

来源：

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES | 2022年 / 23卷 / 09期

关键词：

Arabidopsis; disease; phytohormones; strigolactones; salicylic acid; systemic acquired resistance; GR24; strigolactone biosynthesis inhibitor; ethylene; SYSTEMIC ACQUIRED-RESISTANCE; PLANT; ETHYLENE; GERMINATION; IMMUNITY; STRIGA; COLONIZATION; INHIBITION; EXPRESSION; TOLERANCE;

D O I：

10.3390/ijms23095246

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Strigolactones are low-molecular-weight phytohormones that play several roles in plants, such as regulation of shoot branching and interactions with arbuscular mycorrhizal fungi and parasitic weeds. Recently, strigolactones have been shown to be involved in plant responses to abiotic and biotic stress conditions. Herein, we analyzed the effects of strigolactones on systemic acquired resistance induced through salicylic acid-mediated signaling. We observed that the systemic acquired resistance inducer enhanced disease resistance in strigolactone-signaling and biosynthesis-deficient mutants. However, the amount of endogenous salicylic acid and the expression levels of salicylic acid-responsive genes were lower in strigolactone signaling-deficient max2 mutants than in wildtype plants. In both the wildtype and strigolactone biosynthesis-deficient mutants, the strigolactone analog GR24 enhanced disease resistance, whereas treatment with a strigolactone biosynthesis inhibitor suppressed disease resistance in the wildtype. Before inoculation of wildtype plants with pathogenic bacteria, treatment with GR24 did not induce defense-related genes; however, salicylic acid-responsive defense genes were rapidly induced after pathogenic infection. These findings suggest that strigolactones have a priming effect on Arabidopsis thaliana by inducing salicylic acid-mediated disease resistance.

引用

页数：14