Journey to Nodule Formation: From Molecular Dialogue to Nitrogen Fixation

Kassaw, Tessema; Frugoli, Julia

doi:10.1007/978-3-642-39317-4_1

Cited by 2 publications

(1 citation statement)

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“…That is, a flavonoid secreted from the roots of a leguminous plant acts as a chemoattractant for a rhizobium, and the flavonoid induces gene expression involved in symbiosis in the rhizobium. The gene product, lipochitooligosaccharide, which is called Nod factor, is secreted by the rhizobium and acts on the plant to induce expression of nodulin genes leading to root hair deformation, inclusion of rhizobium into plant tissues, and nodulation. , The host plant and symbiotic rhizobium species are strictly interrelated by the specific signaling substances. Besides flavonoids, hydroxylated aromatic acids including protocatechuic acid (3,4-dihydroxybenzoic acid) and p -hydroxybenzoic acid and vanillyl alcohol are also known to be chemoattractants for rhizobia …”

Section: Introductionmentioning

confidence: 99%

Effect of Secondary Metabolites of Tomato (Solanum lycopersicum) on Chemotaxis of Ralstonia solanacearum, Pathogen of Bacterial Wilt Disease

Hasegawa

Kato

Okabe

et al. 2019

J. Agric. Food Chem.

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The chemotactic activity of the pathogen of bacterial wilt disease, Ralstonia solanacearum, was tested against 30 aromatic acids and plant hormones infused on filter discs in bioassays on agar plates. 4-Hydroxycinnamic acid (p-coumaric acid) and 4-hydroxybenzoic acid were strong chemoattractants, 3,4-dihydroxybenzoic acid (protocatechuic acid) and jasmonic acid were weak attractants, and 2-hydroxybenzoic acid (salicylic acid) showed both attracting and repelling activity depending on dose. Examination of the dose dependency revealed that the ED 50 for 4-hydroxycinnamic acid and 4-hydroxybenzoic acid was 0.08 and 0.39 μmol/disc, respectively. 2-Hydroxybenzoic acid showed chemoattractant activity at 0.33 μmol/disc but chemorepellent activity at 3.3 μmol/disc, and bacterial random motility was activated at 1.0 μmol/disc and bacterial activity was suppressed at 33 μmol/disc. Although water-soluble attractants including amino acids and organic acids have been previously investigated, this is the first report of hydroxylated aromatic acids (HAAs) as chemoattractants of R. solanacearum.

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Section: Introductionmentioning

confidence: 99%