Origin, Nature and Biological Activity of Aliphatic Substances and Growth Hormones Found in Soil

Assessment of Rice Associated Bacterial Ability to Enhance Rice Seed Germination and Rice Growth Promotion

“…Rice growth promotion can be achieved by beneficial bacteria but the exact mechanism by which PGPB induce their effects is not clearly understood, however, several hypotheses such as producing phytohormones, activation of phosphate solubilization and promotion of the mineral nutrient uptake are usually considered to be involved 8,14,26,29 . Production of phytohormones is one of the important mechanism and indole-3 acetic acid (IAA), which is a member of native auxin, is a common metabolism produced by several beneficial bacteria 31 . Indole-3 acetic acid stimulates cell elongation through enhancement of cell osmotic contents and cell wall synthesis, permeability of water into cell, decrease in wall pressure and inducing protein synthesis, flowering and fruiting 2 .…”

Optimization of Indole-3-acetic Acid (IAA) Production by Bacillus megaterium BM5

“…이들 식물 호르몬 중 auxin은 세포의 분열, 크기 및 길이의 증가 및 원뿌리와 곁뿌리 사이의 성장 분포 등 식물 발달의 모든 과정에 작용하면서 (Davies, 1995;Reed, 2001) (Frankenberger and Arshad, 1995;Lynch, 1985).…”

Challenges of climate change

“…58,59 IAA (indoleacetic acid) is a product of l-tryptophan metabolism in bacteria and is prevalent in the rhizosphere because of the rich supplies of substrates exuded from the roots. 60,61 Phosphate solubilizing bacteria (PSBs) inhabiting the rhizosphere are promising biofertlizers as these are known for secretion of organic acids and phosphates to solubilise insoluble phosphate to soluble forms. 62 PGPR's also secrete Siderophores, in response to iron deficiency, which help in the transportation of ferric iron into plant cells from insoluble forms.…”