Walter Radamés Accorsi

Morfologia do fruto e da semente de Euterpe edulis, Mart.

This paper describes the fruit and seed morphology of Euterpe edulis, Mart.. The mesocarp has fibrous blade, with 0,5 x 23 mm in average, made of wood fibers, sclereids and spiralated vessels. Endocarp membranous, 0,3 mm thick, with predominancy of sclereids over fibers, lateral hilum, excavated. Opercular area, and operculum with 1,8 mm of diameter. The basal embryo, with cylindrical-conic shape has 3,5 mm length and 1,8 mm in diameter. It has two regions, one conic and the other cylindrical. They correspond respectively to the median part and to the sheath of the cotyledon. The firts one develops during the germination in haustorium, and the second enclosed the plumule and the hypocotyl-root axis. The radicle is enclosed by the coleorhiza and the plumule by an coleoptile.

Observações preliminares sôbre a longevidade dos "Seedlings" de feijoeiro - Phaseolus vulgaris : em função das reservas cotiledonares

According previous studies about longevity in maize by ACCORSI e ADÂMOLI DE BARROS, (1961) the authors presents in this paper the results of work on longevity of seedlings of beans. Seeds were separated in three groups according their weight, as followings: small 80-120 mg; medium 130-140 mg and big 150-200 mg. The sowing of the seeds was made in pure sand and the seedlings were distributed in distil. water and in complete solution of Arnon and Hoagland. Each treatment was made in two replications with eight seedlings by treatment. At present time the following conclusions can be related: 1.°) - Eight days after germination, the cotiledones of all the seedlings started to fell down, fourteen days after, all cotiledones had fell down. 2.°) - Fifteen days after germination, the seedlings in nutritive solution showed better development than those in distil. water. Table I e II gives results. 3.°) - All seedlings in distil. water showed symptoms of N, Ca, Fe deficiencies. 4.°) - Twenty nine days after germination the seedlings in distil. water manifested exhaust trace, by falling of the leaves and death of some plants although the aplicai buds keep green. 5.°) - After thirty-one days the plants in nutritives solution was in better condition than those in distil. water, although some alteration aboved mentioned was observed. The causes of this alteration are being studied. 6.°) - In many plants in complet solution the seminal leaves showed clorosis initial and some with necrosis, although apical buds keeps in ativity. 7.°) - Symptoms of clorosis and necrosis in diferents stages were observed in all leaflet; these symptoms were more strong in the groups of little seed and medium seeds.