scholarly journals Effects of water stress and inoculation with plant growth promoting rhizobacteria (PGPR) on antioxidant status and photosynthetic pigments in basil (Ocimum basilicum L.)

2012 ◽  
Vol 11 (1) ◽  
pp. 57-61 ◽  
Author(s):  
Mostafa Heidari ◽  
Amir Golpayegani
Keyword(s):  
Water Stress ◽  
Plant Growth ◽  
Photosynthetic Pigments ◽  
Antioxidant Status ◽  
Plant Growth Promoting Rhizobacteria ◽  
Ocimum Basilicum ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Genomic Analysis of Serratia plymuthica MBSA-MJ1: A Plant Growth Promoting Rhizobacteria That Improves Water Stress Tolerance in Greenhouse Ornamentals

2021 ◽  
Vol 12 ◽  
Author(s):  
Nathan P. Nordstedt ◽  
Michelle L. Jones
Keyword(s):  
Water Stress ◽  
Plant Growth ◽  
Stress Tolerance ◽  
Stress Responses ◽  
Plant Growth Promoting Rhizobacteria ◽  
Serratia Plymuthica ◽  
Water Stress Tolerance ◽  
Plant Growth Promoting ◽  
Growth Promoting

Water stress decreases the health and quality of horticulture crops by inhibiting photosynthesis, transpiration, and nutrient uptake. Application of plant growth promoting rhizobacteria (PGPR) can increase the growth, stress tolerance, and overall quality of field and greenhouse grown crops subjected to water stress. Here, we evaluated Serratia plymuthica MBSA-MJ1 for its ability to increase plant growth and quality of Petunia × hybrida (petunia), Impatiens walleriana (impatiens), and Viola × wittrockiana (pansy) plants recovering from severe water stress. Plants were treated weekly with inoculum of MBSA-MJ1, and plant growth and quality were evaluated 2 weeks after recovery from water stress. Application of S. plymuthica MBSA-MJ1 increased the visual quality and shoot biomass of petunia and impatiens and increased the flower number of petunia after recovery from water stress. In addition, in vitro characterizations showed that MBSA-MJ1 is a motile bacterium with moderate levels of antibiotic resistance that can withstand osmotic stress. Further, comprehensive genomic analyses identified genes putatively involved in bacterial osmotic and oxidative stress responses and the synthesis of osmoprotectants and vitamins that could potentially be involved in increasing plant water stress tolerance. This work provides a better understanding of potential mechanisms involved in beneficial plant-microbe interactions under abiotic stress using a novel S. plymuthica strain as a model.

Field evaluation of asparagus crowns and germinating seeds inoculated with plant growth-promoting rhizobacteria

2009 ◽  
Vol 89 (6) ◽  
pp. 1133-1138
Author(s):  
S M Liddycoat ◽  
D J Wolyn
Keyword(s):  
Water Stress ◽  
Plant Growth ◽  
Field Evaluation ◽  
Dry Weight ◽  
Plant Growth Promoting Rhizobacteria ◽  
Asparagus Officinalis ◽  
Shoot Height ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Germinating Seeds

Plant growth-promoting rhizobacteria (PGPR) have the ability to enhance growth and establishment by reducing stress ethylene, or providing exogenous indol-3-acetic acid (IAA), nitrogen, iron, or phosphorus. In previous greenhouse studies, PGPR inoculation of asparagus seeds or seedlings enhanced growth under optimal and water stress conditions. Experiments were conducted in this study to determine if PGPR could provide benefits to transplanted crowns and germinating seeds in the field. Plant growth-promoting rhizobacteria did not positively affect shoot height, count, or diameter of inoculated crowns, or percent germination and seedling dry weight of inoculated seeds. The limitations of using PGPR in the field and potential for future success are discussed.Key words: Asparagus officinalis, Pseudomonas , water stress, drought, irrigation

The effect of plant growth-promoting rhizobacteria on asparagus seedlings and germinating seeds subjected to water stress under greenhouse conditions

2009 ◽  
Vol 55 (4) ◽  
pp. 388-394 ◽  
Author(s):  
Scott M. Liddycoat ◽  
Bruce M. Greenberg ◽  
David J. Wolyn
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Asparagus Officinalis ◽  
Positive Effects ◽  
Transplant Shock ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Germinating Seeds

Plant growth-promoting rhizobacteria (PGPR) can have positive effects on vigour and productivity, especially under stress conditions. In asparagus ( Asparagus officinalis L.) field culture, seeds are planted in high-density nurseries, and 1-year-old crowns are transplanted to production fields. Performance can be negatively affected by water stress, transplant shock, and disease pressure on wounded roots. PGPR inoculation has the potential to alleviate some of the stresses incurred in the production system. In this study, the effects of PGPR ( Pseudomonas spp.) treatment were determined on 3-week-old greenhouse-grown seedlings and germinating seeds of 2 asparagus cultivars. The pots were irrigated to a predetermined level that resulted in optimum growth or the plants were subjected to drought or flooding stress for 8 weeks. The cultivars responded differently to PGPR: single inoculations of seedlings enhanced growth of ‘Guelph Millennium’ under optimum conditions and ‘Jersey Giant’ seedlings under drought stress. Seed inoculations with PGPR resulted in a positive response only for ‘Guelph Millennium’, for which both single or multiple inoculations enhanced plant growth under drought stress.

scholarly journals Water Stress Amelioration and Plant Growth Promotion in Capsicum Plants by Osmotic Stress Tolerant Bacteria

2019 ◽  
pp. 1-12 ◽  
Author(s):  
Shweta Gupta ◽  
Rajesh Kaushal ◽  
Gaurav Sood ◽  
Bhawna Dipta ◽  
Shruti Kirti ◽  
...  
Keyword(s):  
Water Stress ◽  
Plant Growth ◽  
Growth Promotion ◽  
Field Capacity ◽  
Plant Growth Promoting Rhizobacteria ◽  
In Vivo Studies ◽  
Shoot Biomass ◽  
Plant Growth Promoting ◽  
Growth Promoting

The present study was initiated with testing of fifteen previously isolated indigenous plant growth promoting rhizobacteria for drought tolerance. Among all, two best isolates Pseudomonas aeruginosa (JHA6) and Bacillus amyloliquefaciens (ROH14) were selected for in-vivo studies. A total of ten treatments comprising Plant growth promoting rhizobacteria (PGPR) (JHA6 and ROH14) inoculated plants held at 80%, 60% and 40% field capacity (FC) soil moisture level was laid down in Completely Randomized Design with three replications. Un-inoculated plants held at various stress levels and non-stressed conditions (100% FC) served as control. In general, both the bacteria could promote Capsicum growth in terms of increase in root and shoot biomass, height of plants, chlorophyll content as well as increase in nutrient content and uptake. Besides, the bacterial inoculated Capsicum plants could withstand water stress more efficiently as indicated by increases in leaf area, total soluble proteins and relative water content of treated water stressed plants in comparison to untreated stressed ones. Enhanced antioxidant responses were evident as elevated activities of enzymes such as superoxide dismutase, catalase and peroxidase was recorded. Therefore, the ability of Capsicum plants to tolerate water stress is enhanced by application of the isolated bacteria which also function as plant growth promoting rhizobacteria.

RESPUESTA DE VIOLETA AFRICANA (Saintpaulia ionantha H. Wendl.) A LA INOCULACIÓN CON RIZOBACTERIAS PROMOTORAS DEL CRECIMIENTO VEGETAL EN VIVERO

2018 ◽  
Vol 11 (8) ◽  
Author(s):  
L. Lara-Capistrán
Keyword(s):  
Bacillus Subtilis ◽  
Plant Growth ◽  
Carica Papaya ◽  
Baja California ◽  
Plant Growth Promoting Rhizobacteria ◽  
Ocimum Basilicum ◽  
Baja California Sur ◽  
Saintpaulia Ionantha ◽  
Plant Growth Promoting ◽  
Growth Promoting

La violeta africana (Saintpaulia ionantha H. Wendl.) es una especie ornamental de maceta muy apreciada en todo el mundo, cuya demanda genera altos ingresos. Sin embargo, el alza constante en el precio de insumos químicos exige la búsqueda de alternativas de manejo donde los costos de producción mantengan la competitividad local y global del cultivo. En dicho contexto, las rizobacterias promotoras del crecimiento vegetal (PGPR, plant growth-promoting rhizobacteria) son elegibles debido a los alcances sinérgicos y efectos benéficos que concurren en sus hospederas. En el presente trabajo se evaluó el efecto de Bacillus subtilis 1 y B. subtilis 2 (Bs1 y Bs2), aislados de papaya (Carica papaya) y albahaca (Ocimum basilicum) en Baja California Sur (México), respectivamente, sobre S. ionantha en vivero comercial, bajo las rutinarias condiciones de manipulación del productor. Se consideraron 9 tratamientos (Fertilizado [F]100%, F50%, F75%, Bs1, Bs2, Bs1+F50%, Bs2+F50%, Bs1´+F75% and Bs2+F75%), con 50 repeticiones, donde se estimaron número de hojas, área foliar, peso seco de hojas, raíz y pecíolos, número de botones florales así como las Unidades Formadores de Colonias (UFC). Los datos procesados con el software comercial STATISTICA (StatSoft Inc., Tulsa, OK) revelaron un incremento significativo en el área foliar de las plantas tratadas con Bs1+75%F (?47.63%) y Bs2+50%F (?37.15%) en relación con plantas fertilizadas al 100%. El mayor número de UFC lo presentó el tratamiento Bs2+50%F (8.91X105 g-1 de suelo rizosférico). Estos resultados demuestran la importancia de incorporar PGPR en estos sistemas de producción, por el ahorro y disminución en la aplicación de fertilizantes inorgánicos.

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