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Use of dehydroascorbic acid against nematode infection in plants

A technology for dehydroascorbic acid and nematode infection, applied in nematicides, plant growth regulators, botany equipment and methods, etc., capable of solving problems such as sugar beet yield damage

Pending Publication Date: 2022-07-29
UNIV GENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Subterranean plant-parasitic nematodes cause apparent damage to sugar beet yields

Method used

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  • Use of dehydroascorbic acid against nematode infection in plants
  • Use of dehydroascorbic acid against nematode infection in plants
  • Use of dehydroascorbic acid against nematode infection in plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1: DHA promotes root growth and embryo crown root formation in rice seedlings

[0082] Three days after germination, rice seedlings were watered with 1 mL of AA (reduced ascorbic acid, 20 mM), DHA (20 mM) or ascorbate oxidase (AO, 20 U / ml) or water as a control. Five days after this application, in DHA-treated seedlings, root length ( figure 1 A), root dry weight ( figure 1 B) and the number of embryo crown roots (ECR; figure 1 C) significantly higher. AA-treated seedlings had slightly shorter roots than control plants ( figure 1 A) and significantly less ECR ( figure 1 C), and seedlings generally appear stronger after DHA treatment. Although AO also had some positive effects on root dry weight and ECR, no root length effect was observed for this compound.

Embodiment 2

[0083] Example 2: DHA improves the tolerance of rice to root knot nematode infection

[0084] Use AA (20 mM), AO (20 U / mL), DHA (20 mM) or water (H 2 O) Foliar spraying on 14 day old rice plants. One day later, half of the plants were inoculated with 250 nematodes per plant, while the other half remained uninfected. Root length of all plants was monitored at three different time points: 4, 8 and 12 days after spraying (DAS). under uninfected conditions ( figure 2 A, left), DHA-only plants had significantly longer roots at 12DAS. Under nematode-infected conditions, AO-treated plants had slightly increased root length, while DHA-treated plants had the most significantly improved root length at both 8DAS (7 days after nematode inoculation) and 12DAS (11 days after nematode inoculation) ( figure 2 B).

Embodiment 3

[0085] Example 3: Protection of rice from root-knot nematode infection by foliar spraying with DHA

[0086] Rice plants were foliar sprayed with AA (20 mM), DHA (20 mM) or ascorbate oxidase (AO, 20 U / ml) 24 h before nematode inoculation. We examined the effect of these treatments on gall numbers and nematode numbers at 12dai. There were no significant differences in the number of galls and the total number of nematodes between control plants and AA sprayed plants ( image 3 A and B), but significantly lower gall numbers were observed in rice plants sprayed with AO or with DHA ( image 3 A) and lower nematode numbers ( image 3 B).

[0087] We also evaluated the effect of foliar application of these chemicals (AA, AO and DHA) on exogenous reduced and oxidized AA (=DHA) levels 24 h after their application. The amount of reduced AA was significantly elevated in the shoots of AA-sprayed plants ( image 3 C), while no change was observed in the root ( image 3 D). After foli...

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Abstract

The present invention relates to the use of dehydroascorbic acid (DHA) or functional analogs for protecting plants from pathogens, in particular from nematode infection. The invention also provides a composition containing the same, a method for preparing the same and a method for preventing and treating plant diseases.

Description

technical field [0001] The present invention relates to the use of dehydroascorbic acid (DHA) for the protection of plants against pathogens, in particular against nematode infection. The present invention also provides a composition comprising the compound, a method for preparing the compound, and a method for controlling plant diseases. Background technique [0002] The agricultural industry has been under pressure to effectively enhance food production in response to growing food demand. The only lasting way to meet this demand is by increasing agricultural productivity from the same (or ideally even less) arable land area. It is estimated that 80% of all crop problems start with root problems, and healthy development of plant roots is the key to improving crop yield (Root Health-the key to improving yield; White paper, 2011 ). Stronger, healthier roots are better suited for absorbing water and nutrients (two of the most important resources). Stronger root systems hel...

Claims

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Application Information

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IPC IPC(8): A01N43/08A01P5/00
CPCA01N43/08A01P5/00
Inventor 蒂娜·金德特里夏德·劳伊·辛格
Owner UNIV GENT
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