Direct and cross-recognition of lichenized Trebouxia Puymaly (Chlorophyta, Trebouxiophyceae) and Nostoc Vaucher ex Bornet (Cyanobacteria, Cyanophyceae) by their homologous and heterologous fungal lectins

Brazilian Journal of Botany - Tập 39 - Trang 507-518 - 2016
Eva M. Díaz1, Carmen Cutrona1, Elena Sánchez-Elordi1, María-Estrella Legaz1, Carlos Vicente1
1Team of Intercellular Communication in Plant Symbiosis, Faculty of Biology, Complutense University, Madrid, Spain

Tóm tắt

In this study, we have used affinity chromatography to purify the lectins from a chlorolichen, Evernia prunastri (L.) Ach., and a cyanolichen, Peltigera canina (Ach.) Schard. These species secrete lectins that display arginase activity in addition to their role as recognition proteins. We found that fluorescently labeled lectins display efficient binding to their ligands on the cell wall. Binding was stronger when the lectin reacted with the producing (homologous) photobiont (alga or cyanobacteria) than with the nonproducing (heterologous) species used throughout the study. To address the specificity of lectin binding, we performed desorption experiments of cell-bound lectins with different hexoses. We found that Evernia lectin is only desorbed by galactose, consistent with its specific binding to a single polygalactosylated ligand. Conversely, Peltigera lectin is desorbed not only by galactose, but also by mannose. This indicates that Peltigera lectin recognizes not only α-d-galactose-containing ligands, but also ligands containing α-d-mannose moieties.

Tài liệu tham khảo

Bubrick P (1988) Effects of symbiosis on the photobionts. In: Galun M (ed) Handbook of lichenology, vol 2. CRC Press, Boca Raton, pp 130–133

Caffaro SV, Mateos JL, Vicente C (1996) Changes in the activity of an enzymatic marker bound to plasmalemma during the photoperiodic flowering induction of soybean. Phyton (Austria) 36:9–28

Cuellar M, Quilhot W, Rubio C, Soto C, Espinoza L, Carrasco H (2008) Phenolics, depsides and triterpenes from the chilean lichen Pseudocyphellaria nudata (Zahlbr.) D.J. Galloway. J Chil Chem Soc 53:1624–1625

Kardish N, Silberstein L, Flemminger G, Galun M (1991) Lectin from the lichen Nephroma laevigatum. Localization and function. Symbiosis 11:47–62

Lehr H, Fleminger G, Galun M (1995) Lectin from the lichen Peltigera membranacea. Characterization and function. Symbiosis 18:1–13

Lowry OH, Rosebrough NJ, Farr AL, Randall RJ (1951) Protein measurement with the Folin phenol reagent. J Biol Chem 193:265–275

Molina MC, Muñiz E, Vicente C (1993) Enzymatic activities of algal-binding protein and its algal cell wall receptor in the lichen Xanthoria parietina. An approach to the parasitic basis of mutualism. Plant Physiol Biochem 31:131–142

Paulsrud P, Rikkinen J, Lindblad P (2001) Field experiments on cyanobacterial specificity in Peltigera aphthosa. New Phytol 152:117–123

Petit P (1982) Phytolectins from the nitrogen-fixing lichen Peltigera horizontalis: the binding pattern of primary protein extract. New Phytol 91:705–710

Petit P, Lallemant R, Savoye D (1983) Purified phytolectin from the lichen Peltigera canina var. canina which binds to the phycobiont cell walls and its use as cytochemical marker in situ. New Phytol 94:103–110