IAA and ACC Deaminase Producing-PGPR Isolated from the Rhizosphere of Pineapple Plants Grown Under Different Abiotic and Biotic Stresses

Screening of rhizobacteria for multi-trait plant growth-promoting ability and antagonism against B. fabae, the causative agent of chocolate spot disease of faba bean

“…Results in Table 4 revealed that rhizobacteria isolates GY01, GY03, and GY08 are closely related to Acinetobacter sp., isolate GY04 and GY05 are closely related to Chryseobacterium sp., isolate GY06 and GY07 are closely related to Pseudomonas , and GY02 is identified as Bacterium strain GY02. Earlier reports also isolated and identified similar PGP bacteria from different plant rhizospheric soils [ [17] , [34] , [35] , [44] , [45] , [46] , [47] ].…”

“…The ability of various rhizobacteria to promote plant growth, increase crop yield, improve soil quality, and control phytopathogens in different crops, including faba beans, has been reported by [ [31] , [32] , [33] , [34] , [35] ]. However, the performance of rhizobacteria inoculants in the field was in question.…”

“…From the selected eight isolates, except for isolate GY06, seven were able to produce IAA. The ability of rhizosphere bacterial strains to produce auxin is a promising tool to study the profound effect of these strains on plant growth [ [34] , [35] , [40] ]. Indole-3-acetic acid (IAA) has a positive effect on the root length and increases root branches, root laterals, and root hair, thereby enhancing the nutrient uptake capacity from the surrounding environment [ 41 ].…”

Succession of tissue microbial community during oat developmental

“…Endophytic bacteria inhabit plants and promote plant growth through three main mechanisms: stimulation, fertilization, and control [ 22 ]. Stimulation is the direct production of plant hormones by endophytes that promote plant growth, such as IAA, which promotes the absorption of nutrients by the roots [ 23 ]. Santoyo et al also confirmed this view that endophytes directly or indirectly promote plant growth and development by promoting the synthesis of inert IAA, ethylene, and other hormones in plants [ 24 ].…”

Sphingomonas panaciterrae PB20 increases growth, photosynthetic pigments, antioxidants, and mineral nutrient contents in spinach (Spinacia oleracea L.)

“…PGPR are also reported to produce indole acetic acid [ 10 , 11 ], siderophore [ 12 ], and other phytohormones that promote plant growth [ 13 , 14 ]. They combat the limited availability of nutrients and biotic and abiotic stress through increasing root growth and various other processes such as biological nitrogen fixation [ 15 ], phosphate solubilization [ 16 ], indole acetic acid (IAA) production [ 17 ], ACC deaminase activity [ 18 ], antipathogenic activity [ 19 ], hydrogen cyanide (HCN) production, metal tolerance, and induction of systemic resistance [ 20 , 21 ]. Some bacteria can increase plant antioxidant enzyme content and activity [ [22] , [23] , [24] ].…”