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在西瓜植物与病原菌互作过程中，枯萎病菌感病和抗病品种的激素和代谢物响应。

Hormonal and metabolites responses in Fusarium wilt-susceptible and -resistant watermelon plants during plant-pathogen interactions.

机构信息

Vegetable and Fruit Improvement Center, Department of Horticultural Sciences, Texas A&M University, 1500 Research Parkway, Suite A120, College Station, TX, 77845, USA.

Texas Plant Disease Diagnostic Laboratory, Texas A&M AgriLife Extension Service, College Station, TX, 77843, USA.

出版信息

BMC Plant Biol. 2020 Oct 22;20(1):481. doi: 10.1186/s12870-020-02686-9.

DOI:10.1186/s12870-020-02686-9
PMID:33092532
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7579875/
Abstract

BACKGROUND

Fusarium oxysporum f. sp. niveum (FON) causes Fusarium wilt in watermelon. Several disease-resistant watermelon varieties have been developed to combat Fusarium wilt. However, the key metabolites that mount defense responses in these watermelon varieties are unknown. Herein, we analyzed hormones, melatonin, phenolic acids, and amino acid profiles in the leaf tissue of FON zero (0)-resistant (PI-296341, Calhoun Grey, and Charleston Grey) and -susceptible (Sugar Baby) watermelon varieties before and after infection.

RESULTS

We found that jasmonic acid-isoleucine (JA-Ile) and methyl jasmonate (MeJA) were selectively accumulated in one or more studied resistant varieties upon infection. However, indole-3-acetic acid (IAA) was only observed in the FON 0 inoculated plants of all varieties on the 16th day of post-inoculation. The melatonin content of PI-296341 decreased upon infection. Conversely, melatonin was only detected in the FON 0 inoculated plants of Sugar Baby and Charleston Grey varieties. On the 16th day of post-inoculation, the lysine content in resistant varieties was significantly reduced, whereas it was found to be elevated in the susceptible variety.

CONCLUSIONS

Taken together, Me-JA, JA-Ile, melatonin, and lysine may have crucial roles in developing defense responses against the FON 0 pathogen, and IAA can be a biomarker of FON 0 infection in watermelon plants.

摘要

背景

尖孢镰刀菌古巴专化型（FON）引起西瓜枯萎病。已经开发了几种抗病西瓜品种来防治枯萎病。然而，这些西瓜品种中引发防御反应的关键代谢物尚不清楚。在此，我们分析了 FON0 抗性（PI-296341、Calhoun Grey 和 Charleston Grey）和易感（Sugar Baby）西瓜品种叶片组织在感染前后的激素、褪黑素、酚酸和氨基酸谱。

结果

我们发现茉莉酸异亮氨酸（JA-Ile）和茉莉酸甲酯（MeJA）在一种或多种研究的抗性品种中被选择性积累。然而，吲哚-3-乙酸（IAA）仅在所有品种的 FON0 接种植物中于接种后第 16 天观察到。PI-296341 中的褪黑素含量在感染后下降。相反，褪黑素仅在 Sugar Baby 和 Charleston Grey 品种的 FON0 接种植物中检测到。在接种后第 16 天，抗性品种中的赖氨酸含量显著降低，而在易感品种中发现其含量升高。

结论

综上所述，Me-JA、JA-Ile、褪黑素和赖氨酸可能在对 FON0 病原体产生防御反应中起关键作用，而 IAA 可以作为西瓜植株感染 FON0 的生物标志物。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ef5/7579875/e5727eaaf412/12870_2020_2686_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ef5/7579875/c47f4f1bc3d7/12870_2020_2686_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ef5/7579875/249194e39e43/12870_2020_2686_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ef5/7579875/3de129a5e5e9/12870_2020_2686_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ef5/7579875/4bbff73d9993/12870_2020_2686_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ef5/7579875/e5727eaaf412/12870_2020_2686_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ef5/7579875/c47f4f1bc3d7/12870_2020_2686_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ef5/7579875/249194e39e43/12870_2020_2686_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ef5/7579875/3de129a5e5e9/12870_2020_2686_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ef5/7579875/4bbff73d9993/12870_2020_2686_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ef5/7579875/e5727eaaf412/12870_2020_2686_Fig5_HTML.jpg

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