イネの酢酸処理に伴うgaba生合成とその蓄積

Isaji, Shunsaku; Yoshinaga, Naoko; Teraishi, Masayoshi; Ogawa, Daisuke; Kato, Etsuko; Okumoto, Yutaka; Habu, Yoshiki; Mori, Naoki

doi:10.1584/jpestics.d18-036

Cited by 10 publications

(4 citation statements)

References 28 publications

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“…However, with the deepening of drought, plant root respiration is reduced, resulting in an insufficient supply of ATP (adenosine triphosphate) and a significant decrease in root activity that leads to slowing or even stops the growth ( Kim, Chae & Choi, 2020 ; Nikolova et al, 2020 ). The water balance in plants also alters, causing irreversible damage to the plants ( Ma et al, 2012 ; Isaji et al, 2018 ). Some studies found that under short-term drought stress, Robinia pseudoacacia absorbs more water by promoting the relative growth of fine roots.…”

Section: Introductionmentioning

confidence: 99%

The effects of soil drought stress on growth characteristics, root system, and tissue anatomy of Pinus sylvestris var. mongolica

Meng¹,

Zhang²,

Yin³

2023

PeerJ

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The main purpose of this study was to study the changes in growth, root system, and tissue anatomical structure of Pinus sylvestris var. mongolica under soil drought conditions. In this study, the growth indexes and photosynthesis of P. sylvestris var. mongolica seedlings under soil drought stress were studied by pot cultivation. Continuous pot water control experiment of the indoor culture of P. sylvestris var. mongolica was carried out, ensuring that the soil water content of each treatment reached 80%, 40%, and 20% of the field moisture capacity as control, moderate drought and severe drought, respectively. The submicroscopic structures of the needles and roots were observed using a scanning electron microscope and a transmission electron microscope. The response of soil roots to drought stress was studied by root scanning. Moderate drought stress increased needle stomatal density, while under severe drought stress, stomatal density decreased. At the same time, the total number of root tips, total root length, root surface area, and root volume of seedlings decreased with the deepening of the drought. Furthermore, moderate drought and severe drought stress significantly reduced the chlorophyll a and chlorophyll b content in P. sylvestris var. mongolica seedlings compared to the control group. The needle cells were deformed and damaged, and chloroplasts and mitochondria were damaged, gradually disintegrated, and the number of osmiophiles increased. There was also an increase in nuclear vacuolation.

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Section: Introductionmentioning

confidence: 99%

The effects of soil drought stress on growth characteristics, root system, and tissue anatomy of Pinus sylvestris var. mongolica

Meng¹,

Zhang²,

Yin³

2023

PeerJ

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“…1) suggest that acetic acid-induced signals in roots are transported to shoots. We have recently shown that the exogenously applied acetic acid to rice seedlings is converted to γ-amino butyric acid (GABA) in roots 18 , and therefore we examined here whether GABA and/or other metabolites are transported from roots to shoots in rice. Methyl- 13 C-labeled acetic acid was applied to 2-week-old rice seedlings and xylem sap of the treated seedlings was collected and analyzed by 13 C-NMR ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Acetic-acid-induced jasmonate signaling in root enhances drought avoidance in rice

Ogawa

Suzuki

Yokoo

et al. 2021

Sci Rep

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Conferring drought resistant traits to crops is one of the major aims of current breeding programs in response to global climate changes. We previously showed that exogenous application of acetic acid to roots of various plants could induce increased survivability under subsequent drought stress conditions, but details of the metabolism of exogenously applied acetic acid, and the nature of signals induced by its application, have not been unveiled. In this study, we show that rice rapidly induces jasmonate signaling upon application of acetic acid, resulting in physiological changes similar to those seen under drought. The major metabolite of the exogenously applied acetic acid in xylem sap was determined as glutamine—a common and abundant component of xylem sap—indicating that acetic acid is not the direct agent inducing the observed physiological responses in shoots. Expression of drought-responsive genes in shoot under subsequent drought conditions was attenuated by acetic acid treatment. These data suggest that acetic acid activates root-to-shoot jasmonate signals that partially overlap with those induced by drought, thereby conferring an acclimated state on shoots prior to subsequent drought.

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“…High pH protection of high acetic acid concentrations is not complete, suggesting additional detrimental factors are at play under these conditions. This root growth sensitivity complicates interpretation of the recently reported water stress related phenotypes induced by acetic acid (Kim et al, 2017;Isaji et al, 2018;Rahman et al, 2019;Utsumi et al, 2019), where [HAc] was undefined. The presence of low concentrations of residual ethanol in the treatment vinegar has the potential to confound these acetic acid effects.…”

Section: Discussionmentioning

confidence: 99%

Biostimulant Potential of Acetic Acid Under Drought Stress Is Confounded by pH-Dependent Root Growth Inhibition

Allen

2020

Front. Plant Sci.

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Recent reports of acetic acid-induced drought tolerance and avoidance across a diverse range of plant species encourage consideration of this low-cost commodity organic acid as a biostimulant. These results are surprising as they contrast with earlier studies showing pH-dependent root growth inhibition at similar concentrations. We test the hypothesis that the concentration of the membrane permeable undissociated form of acetic acid (CH 3 COOH) selectively inhibits maize root growth, and subsequently evaluate its impact on seedling water use and growth under deficit irrigation. We demonstrate conclusively for the first time that when germinating maize on filter paper, low pH exacerbates, and high pH mitigates, this inhibition of root growth in a predictable manner based on the dissociation constant of acetic acid. The buffering capacity of potting media can reduce this root damage through keeping the acetic acid primarily in the membrane impermeable dissociated form (CH 3 COO − ) at near neutral pH, but peat substrates appear to offer some protection, even at low pH. While both deficit irrigation and acetic acid reduced water use and growth of maize seedlings outdoors, there was no significant interaction between the treatments. Twenty nine millimolar total acetic acid (CH 3 COOH + CH 3 COO − ) reduced transpiration, compared to lower and higher concentrations, but this did not specifically improve performance under reduced water availability, with parallel declines in shoot biomass leading to relatively consistent water use efficiency. Any acetic acid biostimulant claims under water stress should characterize its dissociation level, and exclude root damage as a primary cause.

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イネの酢酸処理に伴うgaba生合成とその蓄積

Cited by 10 publications

References 28 publications

The effects of soil drought stress on growth characteristics, root system, and tissue anatomy of Pinus sylvestris var. mongolica

The effects of soil drought stress on growth characteristics, root system, and tissue anatomy of Pinus sylvestris var. mongolica

Acetic-acid-induced jasmonate signaling in root enhances drought avoidance in rice

Biostimulant Potential of Acetic Acid Under Drought Stress Is Confounded by pH-Dependent Root Growth Inhibition

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