Table 1 Compilation of known sorghum exudates and their putative effects

 5-deoxystrigol

C₁₉H₂₂O₅

Y

Y

Awad et al.⁷⁴, Yoneyama et al.²⁵

 5-ethoxysorgoleone

C₂₃H₃₁O₄

Allelopathy

Y

Y

Czarnota et al.⁷⁵

 alpha-ketoglutaric acid

C₅H₆O₅

unspecified

Y

Vranova et al.³⁵

 Arabinose

C₅H₁₀O₅

Rhizosphere stimulation

Y

Y

Y

Bertin et al.⁷⁶, Vranova et al.³⁵

 Benzoquinone sorgoleone

C₂₂H₃₀O₄

Allelopathy

Y

Y

Baerson et al.⁷⁷

 Caffeic acid

C₉H₈O₄

Allelopathy

Y

Sène et al.²²

 Citric acid

C₆H₈O₇

Iron and P acquisition

Y

Bertin et al.⁷⁶, Abadía et al.⁷⁸, Bradley and Sieling⁷⁹

 Ferulic acid

C₁₀H₁₀O₄

Allelopathy

Y

Sène et al.²², Cheema et al.⁸⁰

 Fructose

C₆H₁₂O₆

Rhizosphere stimulation

Y

Y

Y

Bertin et al.⁷⁶, Vranova et al.³⁵

 Fucose

C₆H₁₂O₆

Rhizosphere stimulation

Y

Bertin et al.⁷⁶

 Galactose

C₆H₁₂O₆

Rhizosphere stimulation

Y

Y

Y

Bertin et al.⁷⁶, Vranova et al.³⁵

 Gallic acid

C₇H₆O₅

Allelopathy

Y

Cheema et al.⁸⁰

 Gentisic acid

C₇H₆O₅

Allelopathy

Y

Sène et al.²²

 Gluconate

C₆H₁₂O₇

Not specified

Y

Vranova et al.³⁵

 Glucose

C₆H₁₂O₆

Rhizosphere stimulation

Y

Y

Y

Vranova et al.³⁵, Bradley and Sieling⁷⁹

 Glutaric

C₅H₈O₄

Nutrient acquisition

Y

Bertin et al.⁷⁶

 Inositol

C₆H₁₂O₆

Not specified

Y

Y

Y

Vranova et al.³⁵

 Malic acid

C₄H₆O₅

Iron and P acquisition

Y

Y

Y

Bertin et al.⁷⁶, Abadía et al.⁷⁸, Bradley and Sieling⁷⁹, Vranova et al.³⁵

 Maltose

C₁₂H₂₂O₁₂

Rhizosphere stimulation

Y

Bertin et al.⁷⁶

 p-coumaric acid

C₉H₈O₃

Allelopathy

Y

Sène et al.²², Cheema et al.⁸⁰

 p-hydroxybenzoic acid

C₇H₆O₃

Allelopathy

Y

Sène et al.²², Cheema et al.⁸⁰

 Protocatechuic acid

C₇H₆O₄

Allelopathy

Y

Sène et al.²², Cheema et al.⁸⁰, Kakar et al.⁸¹

 Raffinose

C₁₈H₃₂O₁₈

Rhizosphere stimulation

Y

Bertin et al.⁷⁶

 Rhamnose

C₆H₁₂O₆

Rhizosphere stimulation

Y

Bertin et al.⁷⁶

 Ribitol

C₅H₁₂O₅

Not specified

Y

Y

Y

Vranova et al.³⁵

 Ribose

C₅H₁₀O₅

Rhizosphere stimulation

Y

Bertin et al.⁷⁶

 Sorghumol

C₃₀H₅₀O

Germination stimulant

Y

Awad et al.⁷⁴

 Strigol

C₁₉H₂₂O₆

Germination stimulant

Y

Awad et al.⁷⁴

 Sucrose

C₅H₁₀O₅

Rhizosphere stimulation

Y

Y

Y

Bertin et al.⁷⁶, Vranova et al.³⁵

 Syringaldehyde

C₉H₁₀O₄

Allelopathy

Y

Sène et al.²²

 Syringic acid

C₉H₁₀O₅

Allelopathy

Y

Sène et al.²², Cheema et al.⁸⁰

 Tartaric acid

C₄H₆O₆

Nutrient acquisition

Y

Y

Y

Bertin et al.⁷⁶, Vranova et al.³⁵

 Tartrate

C₄H₄O₆

Phosphorus acquisition

Y

Bradley and Sieling⁷⁹

 Trans-aconitic acid

C₆H₆O₆

unspecified

Y

Y

Y

Vranova et al.³⁵

 Vanillic acid

C₈H₈O₄

Allelopathy

Y

Sène et al.²², Cheema et al.⁸⁰

 Vanillin

C₈H₈O₃

Allelopathy

Y

Sène et al.²²

 Xylose

C₆H₁₂O₆

unspecified

Y

Y

Y

Bertin et al.⁷⁶, Vranova et al.³⁵

 Glutamic acid

C₅H₉NO₄

unspecified

Y

Vranova et al.³⁵

 Aspartic acid

C₄H₇NO₄

unspecified

Y

Vranova et al.³⁵

 Iso- and -leucine

C₆H₁₃NO₂

unspecified

Y

Y

Y

Vranova et al.³⁵

 Lysine

C₆H₁₄O₂N₂

unspecified

Y

Y

Y

Vranova et al.³⁵

 Arginine

C₆H₁₄O₂N₄

unspecified

Y

Y

Y

Vranova et al.³⁵

 Histidine

C₆H₉O₂N₃

unspecified

Y

Y

Y

Vranova et al.³⁵