Expression of lec-1, a mycobiont gene encoding a galectin-like protein in the lichen Peltigera membranacea
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Expression of lec-1, a mycobiont gene encoding a galectin-like protein in the lichen Peltigera membranacea. / Miao, Vivian P.W.; Manoharan, Sheeba S.; Snæbjarnarson, Vésteinn; Andrésson, Ólafur S.
In: Symbiosis, Vol. 57, No. 1, 05.2012, p. 23-31.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - Expression of lec-1, a mycobiont gene encoding a galectin-like protein in the lichen Peltigera membranacea
AU - Miao, Vivian P.W.
AU - Manoharan, Sheeba S.
AU - Snæbjarnarson, Vésteinn
AU - Andrésson, Ólafur S.
PY - 2012/5
Y1 - 2012/5
N2 - The lichen Peltigera membranacea is an association of two symbionts: the mycobiont, a heterotrophic ascomycete, and the photobiont, a Nostoc sp. cyanobacterium. The lec-1 gene, encoding a galectin-like protein, was identified in the metagenome sequence of the lichen, and analysis of the gene structure indicated that it was derived from the mycobiont. This was confirmed by transcriptomic analysis of freshly collected samples in which expression of lec-1 was detected in apothecia and rhizines, tissues that are composed of only fungal cells. Expression of lec-1 in portions of the lichen thallus that included both symbionts was up to two orders of magnitude greater than in tissues lacking photobionts; in contrast, expression of a housekeeping gene stayed relatively constant. These results show that lec-1 expression is influenced by the presence of the photobiont, consistent with a model in which recognition of photobiont ligands by lectins such as lec-1 is a factor in the establishment or maintenance of compatible symbionts.
AB - The lichen Peltigera membranacea is an association of two symbionts: the mycobiont, a heterotrophic ascomycete, and the photobiont, a Nostoc sp. cyanobacterium. The lec-1 gene, encoding a galectin-like protein, was identified in the metagenome sequence of the lichen, and analysis of the gene structure indicated that it was derived from the mycobiont. This was confirmed by transcriptomic analysis of freshly collected samples in which expression of lec-1 was detected in apothecia and rhizines, tissues that are composed of only fungal cells. Expression of lec-1 in portions of the lichen thallus that included both symbionts was up to two orders of magnitude greater than in tissues lacking photobionts; in contrast, expression of a housekeeping gene stayed relatively constant. These results show that lec-1 expression is influenced by the presence of the photobiont, consistent with a model in which recognition of photobiont ligands by lectins such as lec-1 is a factor in the establishment or maintenance of compatible symbionts.
KW - gpd-1
KW - lec-1
KW - Lectin
KW - Mycobiont
KW - Symbiosis
KW - Transcription
KW - tub-2
U2 - 10.1007/s13199-012-0175-1
DO - 10.1007/s13199-012-0175-1
M3 - Journal article
AN - SCOPUS:84865487459
VL - 57
SP - 23
EP - 31
JO - Symbiosis
JF - Symbiosis
SN - 0334-5114
IS - 1
ER -
ID: 371185140