The present study is concerned with
investigation of the mycorrhizal dependency on the
lettuce plants not only to determine their growth but
also for the multiplication of mycorrhiza inoculum.
Mycorrhizal spores were collected from five weed plants
in Mawlamyine University Campus by using floating
adhesion technique (Sutton and Barron, 1972) and wet
sieving method (Gerdmann and Nicolson, 1963).
Mycorrhiza, collected from five selected weeds plants
were mixed with sterile soil and inoculate on lettuce
plants. Spores density and mycorrhizal colonization
from rhizosphere of lettuce plants were recorded in
every two weeks. Among five selected weed plants, the
maximum rate of spore number and the highest
colonization percent of mycorrhiza (77% in November)
were found from source plant of Eclipta alba ( L.)
Hassk. (Kyeik hman). Mycorrhiza isolated from Eclipta
alba ( L.) Hassk. (Kyeik hman) were used as natural
mycorrhizal inoculum (nmi) and subjected into seedling
of Lactuca sativa L.(lettuce) by using polyethylene bag
experiments with different treatment. Mycorrhizal
dependency of lettuce plants were evaluated with
mycorrhizal inoculum potential assay (MIP) method
(Jarstfer, A.G. 2002). According to the result, the
highest mycorrhiza inoculum potential (MIP) index
were obtained in combination of 1 kg (nmi) + 3.5 kg
(Soil) T2 (10.50) and 1 kg (nmi) + 0.5 kg (Cow Dung) +
3.5 kg (Soil) T4 (10.50) respectively.
Keywords : Weed, Mycorrhizal Dependency, Mycorrhizal Inoculum, Spores, Eclipta Alba (L.) Hassk., Lactuca Sativa L.