The Role of Plant Growth Hormones in Determining the Resistance of Tomato Plants To the Root-Knot Nematode, Meloidogyne Incognita

Our agriculture is threatened by climate change and the depletion of resources and biodiversity. A new agriculture revolution is needed in order to increase the production of crops and ensure the quality and safety of food, in a sustainable way. Nanotechnology can contribute to the sustainability of agriculture. Seed nano-priming is an efficient process that can change seed metabolism and signaling pathways, affecting not only germination and seedling establishment but also the entire plant lifecycle. Studies have shown various benefits of using seed nano-priming, such as improved plant growth and development, increased productivity, and a better nutritional quality of food. Nano-priming modulates biochemical pathways and the balance between reactive oxygen species and plant growth hormones, resulting in the promotion of stress and diseases resistance outcoming in the reduction of pesticides and fertilizers. The present review provides an overview of advances in the field, showing the challenges and possibilities concerning the use of nanotechnology in seed nano-priming, as a contribution to sustainable agricultural practices.

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Studies in Plant Growth Hormones

Journal of Experimental Botany ◽

10.1093/jxb/7.2.219 ◽

1956 ◽

Vol 7 (2) ◽

pp. 219-238 ◽

Cited By ~ 19

Author(s):

S. HOUSLEY ◽

J. A. BENTLEY

Keyword(s):

Plant Growth ◽

Growth Hormones ◽

Plant Growth Hormones

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Expression profile of jasmonic acid-induced genes and the induced resistance against the root-knot nematode (Meloidogyne incognita) in tomato plants (Solanum lycopersicum) after foliar treatment with methyl jasmonate

Journal of Plant Physiology ◽

10.1016/j.jplph.2010.12.002 ◽

2011 ◽

Vol 168 (10) ◽

pp. 1084-1097 ◽

Cited By ~ 67

Author(s):

Taketo Fujimoto ◽

Yasuhiro Tomitaka ◽

Hiroshi Abe ◽

Shinya Tsuda ◽

Kazuyoshi Futai ◽

...

Keyword(s):

Jasmonic Acid ◽

Methyl Jasmonate ◽

Solanum Lycopersicum ◽

Induced Resistance ◽

Expression Profile ◽

Meloidogyne Incognita ◽

Root Knot Nematode ◽

Tomato Plants ◽

Foliar Treatment ◽

Induced Genes

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Systemically Induced Resistance and Microbial Competitive Exclusion: Implications on Biological Control

Phytopathology ◽

10.1094/phyto-04-11-0120 ◽

2012 ◽

Vol 102 (3) ◽

pp. 260-266 ◽

Cited By ~ 33

Author(s):

A. Martinuz ◽

A. Schouten ◽

R. A. Sikora

Keyword(s):

Meloidogyne Incognita ◽

Defense Mechanisms ◽

Root Colonization ◽

Competitive Exclusion ◽

Spatial Separation ◽

Agricultural Pests ◽

Root Knot Nematode ◽

Tomato Plants ◽

Split Root ◽

Induce Resistance

The root-knot nematode, Meloidogyne incognita, is among the most damaging agricultural pests, particularly to tomato. The mutualistic endophytes Fusarium oxysporum strain Fo162 (Fo162) and Rhizobium etli strain G12 (G12) have been shown to systemically induce resistance toward M. incognita. By using triple-split-root tomato plants, spatially separated but simultaneous inoculation of both endophytes did not lead to additive reductions in M. incognita infection. More importantly, spatially separated inoculation of Fo162 and G12 led to a reduction in Fo162 root colonization of 35 and 39% when G12 was inoculated on a separate root section of the same plant in two independent experiments. In an additional split-root experiment, spatial separation of Fo162 and G12 resulted in a reduction of Fo162 root colonization of approximately 50% over the water controls in two independent experiments. The results suggested that the suppressive activity of G12 on Fo162 and M. incognita is possibly related to the induction of specific plant defense mechanisms. Thus, although Fo162 and G12 have the ability to systemically repress M. incognita infection in tomato, they can be considered incompatible biocontrol agents when both organisms are present simultaneously on the same root system.

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