Leaf Micromorphogy of Cultivated Lettuce (Lactuca sativa L.) and its Wild Relatives

Türkiye’de Nadir Yayılışı Olan Linum punctatum Presl subsp. pycnophyllum (Boiss. & Heldr.) Gustavsson (Benliketen) İçin Yeni Bir Yayılış Alanı

Abstract

Cultivated lettuce (Lactuca sativa L.) is an economically important weedy plant for human consumption at worldwide. The primary gene pool of L. sativa consists of wild L. serriola L., L. aculeata Boiss. & Kotschy, L. azerbaijanica Rech. f., L. georgica Grossh. and L. scarioloides Boiss. while L. saligna L. is in its secondary gene pool. L. sativa has been subjected to various studies due to its economic importance. This study aims to reveal leaf micromorphology of the taxa in the primary and secondary gene pool of L. sativa and determinate these relationships based on leaf micromophological characters through phenetic analysis. In order to achieve these aims, character states of leaves belonging to the taxa were determined through multiple sampling and these data were subjected to analysis. According to the micromorphological data, L. saligna is the closest species to L. sativa and undulate anticlinal wall of epidermis cells is shared common character state for both taxa. The most variation was observed in density of epicuticular wax and wax type among the studied micromorphological characters. On the other hand the states of anticlinal and periclinal walls of epidermis cells are stable within the taxa. Indumentum on abaxial leaf surface is also stable within the taxa except L. saligna. In the light of these findings, anticlinal-periclinal walls of epidermis cells and indumentum can be used as distinctive characters to determine the boundaries between taxa in systematic studies in Lactuca.

Özet

Bu çalışmada, günümüze dek sadece Yunanistan’ın batısından ve Doğu Anadolu’dan bilinen Linum punctatum subsp. pycnophyllum (Benliketen) için Güneybatı Anadolu’dan yeni bir yayılış alanı verilmiştir. Türün betimlerine ilaveten yayılış alanı ve fotoğrafları sunulmuştur. Ayrıca türün, IUCN Kırmızı Liste Sınıfları ve Ölçütleri’ne göre doğadaki tehlike durumu tekrar gözden geçirilmiştir.