The vigor of peanut seeds is decreased by treating with various concentra-tion of methanol for 2 hrs.The higher concentration of methanol is

the lowerthe vigor.When seeds are aged with 50% methanol

they lose their vigor and via-bility.The plasmalemma of the radicle cells contracted inward severely and alot of osmic-like materials were deposited in the space formed by plasmolysis.There are few integrated protein bodies in the cells.The ultrastructure of mito-chondria is damaged.The seeds treated with 20% methanol has still high percenta-ge of germination

but lower vigor index.There are coalescence of electric-den-se materials which might be inside the protein bodies of these cells.The nucleusis surrounded by many spherosomes and few other organelles.The mitochondriaare more or less disintegrated.In the radicle cells of the normal seeds

the orga-nelles including mitochondria

ribosomes and nucleus are well developed

and thenucleolus included granular and fibrous materials.Using the method of electro-conductivity

we could observe that the leakage from seeds aged with methanolincrease greatly.It is suggested that the membrane was damaged.