Table 2. Effects of different PGRs on soybean growth and development reported by different authors.

Name of PGR	Effect	Reference
Auxin	Improves nodulation	Rademacher (2015), Roy Choudhury, Johns & Pandey (2019)
	Development of shoot architecture	Sarkar, Haque & Abdul Karim (2002)
	Increases dry matter accumulation and seed yield	Basuchaudhuri (2016), Dhakne et al. (2015)
	Improves nitrate reductase activity	Senthil, Pathmanaban & Srinivasan (2003)
	Increases protein content of seeds	Basuchaudhuri (2016)
Gibberellins	Enhances water use efficiency (WUE)	Giri et al. (2018)
	Improves enzyme activity and photosynthesis	Yuan & Xu (2001)
	Induces nodulation	Roy Choudhury, Johns & Pandey (2019)
	Improves tolerance to abiotic stress	Hamayun et al. (2017), Qin et al. (2011), Wang et al. (2017)
	Promotes the development of adventitious roots	Steffens, Wang & Sauter (2006)
	Increases seed oil content	Travaglia, Reinoso & Bottini (2009)
	Increases yield and yield components	Dhakne et al. (2015), Khatun et al. (2016), Upadhyay & Rajeev (2015)
	Induces nodulation	Roy Choudhury, Johns & Pandey (2019)
	Increases flowering, pod setting and seed yield	Nagel et al. (2001)
Abscisic acid	Induces stress tolerance	O’Brien & Benková (2013)
	Enhances water use efficiency (WUE)	Gao et al. (2016), Zhao et al. (2018)
	Improves photosynthesis	Qi et al. (2013)
	Induces adventitious root formation	Steffens, Wang & Sauter (2006)
Ethylene	Promotes root and shoot growth, and increases root surface area	Kim et al. (2018)
	Increases tolerance to stress	Hamayun et al. (2015)
Salicylic acid	Increases chlorophyll content, photosynthesis, shoot biomass, and improves antioxidant enzyme activity	Simaei et al. (2011)
	Induces nodulation	Roy Choudhury, Johns & Pandey (2019)
	Improves vegetative growth and yield, increases protein and oil content	Devi et al. (2011), Khatun et al. (2016)
Jasmonic acid	Increases chlorophyll content	Hassanein et al. (2009)
	Increases biomass accumulation and grain yield, improves stress tolerance	Mohamed & Latif (2017)
	Increases nodulation	Roy Choudhury, Johns & Pandey (2019)
	Increases tolerance to stress, biomass accumulation, water use potential, translocation of photoassimilates, and productivity	Zhang et al. (2004), Zhang et al. (2008)
	Improves nodulation	Sudadi (2012)
Amine compounds	Enhances root elongation and increases endogenous hormone levels	Qi et al. (2013)
	Improves chlorophyll content, photosynthesis and CO2 assimilation rate	Qi et al. (2013), Sun et al. (2016), Liu et al. (2019)
	Reduces abscission enzyme activity and increases antioxidant enzyme activity	Sun et al. (2016)
	Delays leaf senescence	Zheng et al. (2008)
	Increases dry matter accumulation and seed yield	Qi et al. (2013), Liu et al. (2019)