Lambertella corni-maris
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| Lambertella corni-maris | |
|---|---|
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Leotiomycetes |
| Order: | Helotiales |
| Family: | Rutstroemiaceae |
| Genus: | Lambertella |
| Species: | L. corni-maris |
| Binomial name | |
| Lambertella corni-maris Höhn. (1918) | |
| Synonyms | |
|
Lambertella corni-maris f. pyrina Höhn. | |
Lambertella corni-maris is a small ascomycete fungi. It grows in deciduous fruit areas,[1] and causes postharvest Lambertella rot on apple fruits.[2] The species also forms a mycoparasitism relationship with Monilinia fructigena. It is the type species of the genus Lambertella.[3]
Description
When found on apples or grown on rotting fruit in the lab, L. corni-maris forms apothecia. The apothecia are positively phototropic, though light does not affect growth.[3] They vary in shape and color depending on maturity. They begin crateriform, then saucer-shaped, then flatten as they mature. They range from pale pink to dark brown, varied by location and age.[1] Apothecia found on apples ranges from 1 to 5 mm, while those found on pears ranged from 1.5 to 7.5 mm.[1]
Asci are shortly stalked, clavate, and inoperculate.[1][3] The average size of asci is 100 x 7.5 μm.[1] Asci contain eight ovoid spores, which begin colorless, and turn dark brown as they mature. Spores are unicellular and contain two vacuoles.[1] Paraphyses are colorless, aseptate and unbranched, and numerous, either equal to or exceeding the number of asci.[1][3]
Lambertella corni-maris has several unique features noted when grown on agar. Its most favorable medium contains glucose and peptone as sources of carbon and nitrogen.[1] Optimum pH for growth is 4.4, though growth occurs from pH 1.6-8.3.[1] The species tends to grow towards areas higher in acidity.[1] It can grow in temperatures ranging from 5° to 30° C, and the optimum temperature is 20° C.[1][5] No growth occurs at 30° C or above.[6] While it is most often found on apples in the wild, under lab conditions it can cause disease on the fruits of pear, plum, quince, orange, lemon,[2] as well as turnip and parsnip.[1] It did not attack when inoculated in young wood of apple, pear, cherry, and plum.[1]