Table 2.

Level of proline accumulation influenced by drought stress in Arbuscular Mycorrhizal symbiotic plants.

Host species	Fungus species	Level of drought	Duration (days)	Proline accumulation		Reference
				Aerial organs	Root
Pistacia vera	C. etunicatum	50% water holding capacity	30	Proline↓	Proline↓	Abbaspour et al., 2012
Antirhinum majus	G. deserticola	Water content (−0.14, −0.38, and −0.55 MPa)	70	Proline↓		Asrar et al., 2012
Solanum lycopersicum	F. mosseae and R. intraradices	Water irrigation was withheld about 3 weeks	20	Proline↑	Proline↑	Chitarra et al., 2016
Knautia arvensis	Glomus sp.	Water regimes 2555% field capacity	84		Proline↓	Doubková et al., 2013
Poncirus trifoliata	F. mosseae	With holding water for 3 days	4	Proline↑	Proline↑	Fan and Liu, 2011
Dracaena fragrans	R. manihotis	30% water availability	55	Proline↑	Proline↑	Kandowangko et al., 2009
Erythrina variegata	R. intraradices	Leaf water potential (−1.20, −2.20, and −3.40 MPa)	60	Proline↓	Proline↓	Manoharan et al., 2010
Citrus tangerine	G. versiforme	55% relative water content	80	Proline↓	Proline↓	Wu et al., 2006
Poncirus trifoliata	G. versiforme	Soil water content (−0.09 and −0.40 MPa)	80	Proline↓	Proline↓	Wu et al., 2007
Poncirus trifoliata	F. mosseae and Paraglomus occultum	50% Water holding capacity	71	Proline↓		Wu et al., 2017
Poncirus trifoliata	F. mosseae	57% water holding capacity	80	Proline↓	Proline↓	Zou et al., 2013

Symbols ↑, and ↓ means that AM symbiosis increased or decreased proline accumulation, respectively.