Relationships between cell membrane stability, exudate content and infectivity of Bradyrhizobium japonicum strain 639 to boron starved soybean plants

• Autorzy: Zehirov G , Georgiev G.
• Języki publikacji: EN

Abstrakty

EN

The influence of boron starvation on the root exudates content in soybean seedlings (Glycine max. L. Merr.) and the effect of exudates pretreatment on the preinfection processes in symbiotic system Br. japonicum strain 636 and soybean were investigated. Root cell membrane stability of boron starved soybean plants (-B) decreased compared to the control. The concentrations of all analyzed metabolites (reducing sugars, free amino acids, organic acids, soluble phenols and total flavonoids) from root exudates of -B plants were lower than the control concentrations. Analysis of polyphenols after HPLC chromatography of root exudates showed significant difference of peak numbers between chromatograms of exudates obtained from boron starved and from control plants. Bacterial culture treatment with root exudates from -B plants showed decreased growth, chemotaxis and attachment ability toward the host root compared to the control exudate treatments. These changes were accompanied by decreased nodulation and acetylene reduction activity of boron starved soybean plants.

Słowa kluczowe

EN

attachment ability; plant physiology; boron starvation; pre-infection process; root; cell membrane; stability; soybean; seedling; Glycine max; chemotaxis; 639 strain; Bradyrhizobium japonicum

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2006
• Tom: 28
• Numer: 2
• Opis fizyczny: p.171-179,fig.,ref.

Twórcy

autor

Zehirov G

• Bulgarian Academy of Sciences, Sofia 1113, Bulgaria

autor

Georgiev G.

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