Mechanisms of acid-resistant Rhodopseudomonas palustris strains to ameliorate acidic stress and promote plant growth

Potential of Phosphorus Solubilizing Purple Nonsulfur Bacteria Isolated from Acid Sulfate Soil in Improving Soil Property, Nutrient Uptake, and Yield of Pineapple (Ananas comosus L. Merrill) under Acidic Stress

“…N concentration in butt, peduncle, slip, and fruit core of pineapple applied biofertilizers with R. sphaeroides W48 and W42 individually were insignifcantly diferent from each other, while they were all distant from the data in treatment without any biofertilizers. PNSB biofertilizers raised the available N and soluble P concentration in soil [13,41]. From that, plants grew strongly, and N and P content in plant parts, including crown, fesh, shell, slip, butt, and leaf increased (Table 4).…”

“…Although pineapple has been recorded with high adaptation to ASS [4], the soil characteristics of low pH and high aluminum (Al), iron (Fe), hydrogen sulfde, and organic acids result in low availability of P by their immobilization with Al 3+ and Fe 2+ to form insoluble compounds as AlPO 4 • H 2 O and FePO 4 • H 2 O [5][6][7][8][9]. Moreover, high acidity and toxicity inhibited plant growth changed the structure and diversity of microorganism [2,[10][11][12][13][14]. P plays a vital role in pineapple growth; this means that P is defcient, and plant growth and quality are afected adversely [15].…”

“…Tis is because of the diferences between wetland (rice) and upland (pineapple) crops. However, PNSB can be grown under both aerobic and anaerobic environments [2,6,7,13,14,24,25] to improve crop yield [23]. Besides, PNSB were efective in providing plant growth regulators such as IAA and siderophores [13]and compounds such as 5-aminolevulinic acid (ALA) and exopolymeric substances (EPS) to help pineapple development in ASS [13,26,27], and reducing Fe 2+ , Al 3+ , and Mn 2+ contamination [2,13,14].…”

“…However, PNSB can be grown under both aerobic and anaerobic environments [2,6,7,13,14,24,25] to improve crop yield [23]. Besides, PNSB were efective in providing plant growth regulators such as IAA and siderophores [13]and compounds such as 5-aminolevulinic acid (ALA) and exopolymeric substances (EPS) to help pineapple development in ASS [13,26,27], and reducing Fe 2+ , Al 3+ , and Mn 2+ contamination [2,13,14]. Terefore, this study aimed to (i) assess purple nonsulfur bacteria (PNSB) possessing the highest (P) solubilizing capacity and (ii) determine the efcacy of PNSB biofertilizers in the improving soil quality, P uptake, growth, and yield of pineapple cultivated in ASS.…”

Inoculation of Pinus halepensis with the Ectomycorrhizal Fungi Scleroderma Helps in Phytoremediation of Soil Polymetallic Pollution

“…Moreover, C/N ratio is considered as one of the most important factors due to ist direct link with the nutrients required for microbial activities [44]. The acidic pH and the poor fertility can be considered as strong limiting factors for plant growth [13,45]. In fact, pH is an important indicator of the soil quality and distribution of microbial community [46] concluded that.…”