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The Effect Of Phosphorous Acid On Plant Immune Response

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Phosphorous acid is a safer and more environmentally friendly alternative to commercial pesticides as it contains a component called phosphite that exhibits fungicidal and bactericidal activities. Foliar spraying and soil drenching are two methods of exposure to phosphite that must be carefully conducted because an excessive amount of phosphite is toxic to plants, impairing their growth and development. Hence, finding the optimal concentration of phosphorous acid that can inhibit pathogens without causing any phytotoxic effects on plants is necessary. This study aimed to examine the effect of phosphorous acid on plant growth and determine the effective concentration of phosphorous acid in foliar spraying and soil drenching mentioned previously. Concentrations of 5-50 mM phosphorous acid were applied to A. thaliana by foliar spraying and 50-100 mM by soil drenching. The growth of A. thaliana after phosphorous acid application was monitored by ImageJ analysis. The plants were incubated for 7 days before infecting them with Pseudomonas syringae pv. Tomato DC3000, an important plant pathogen that causes necrosis within the living plant tissues. The number of bacteria inside the plants was then quantified. The concentrations of 12.5 mM by foliar spraying and 60 mM by soil drenching are the optimal phosphorous acid concentrations in inhibiting the growth of P. syringae the most without causing growth complications in A. thaliana. The concentrations of 50 mM by foliar spraying and 100 mM by soil drenching exhibited phytotoxic effects in plants, such as wilting and chlorosis. These results highlighted the potential of these concentrations to be used commercially as pesticide doses.

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Availability

Detail Information

Series Title

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Call Number

EP BT-008

Publisher

i3L, Jakarta : i3L, Jakarta., 2024

Collation

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Language

English

ISBN/ISSN

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Classification

EP BT-008

Content Type

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Media Type

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Carrier Type

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Edition

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Subject(s)

plant growth
Phosphorous acid
phosphite
infection resistance
foliar spraying
soil drenching

Specific Detail Info

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Statement of Responsibility

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