Role of Endophytes, Plant Growth Promoting Rhizobacteria

Type of Stress

PGPRs

Host

Response in Plants

References

Drought

Burkholderia

phytofirmans

Achromobacter

piechaudii

Azospirillum spp.

Bacillus spp.

Salinity

Pseudomonas

fluorescens

Azospirillum

Pseudomonas

spp.

Azotobacter

Pseudomonas

aeruginosa

Xanthobacter

autotrophicus

Klebsiella

oxytoca

Piriformospora

indica

Maize

Solanum lycopersicum

and Capsicum annuum

Wheat

Lettuce

Arachis hypogaea

Wheat

Rice

Maize

Sunflower

Eggplant

Cotton

Wheat

Increased photosynthetic activity and improved water

uptake.

Induced plant growth under low water availability by

the action of ACC deaminase which lowers ethylene

level in root.

Provide plants growth by inducing IAA and cytokinin.

Increased photosynthetic activity.

Improved salt tolerance and reduced Na+ toxicity.

Improved plant height, grain yield and photosynthetic

pigments.

Germination of seedlings.

Induced uptake of P and K, lowered Na+ intake.

Enhanced plant growth.

Improved minerals uptake.

Maintained plant growth by producing

malondialdehyde, proline, and chlorophyll-a.

Enhanced salt tolerance by producing photosynthetic

pigments and soluble sugars (organic solutes)

Naveed et al. (2014)

Mayak et al. (2004)

Kumar et al. (2019)

Vivas et al. (2003)

Nadeem et al. (2013)

Nia et al. (2012)

Kumar et al. (2019)

Rojas-Tapias et al.

(2012)

Kumar et al. (2019)

Abd El-Azeem et al.

(2012)

Wu et al. (2014)

Zarea et al. (2012)

77

TABLE 3.2 PGPR and Their Effects on Plants Abiotic Stress Tolerance