Observations on the Development and Germination of the Seed in Certain Polygonaceae

The Inter‐relations of Catalase, Respiration, After‐ripening, and Germination in Some Dormant Seeds of the Polygonaceae

“…Studies reported in this paper have to do with the dormancy, after-ripening, catalase, respiration, and germination of seeds of several species of this family. Especial attention has been given the relation between the so-called enzyme catalase and the rate of respiration as found in these seeds.As the enveloping coats have a direct relation to the rate of after-ripening and germination in the seeds, a brief morphological description of the seeds will be given.According to Woodcock (1914) the seed of the polygonums at maturity is enclosed in a thick hard coat, consisting of the cutinized epidermal layer and the compressed inner layers of the ovary. The integuments have become closely compressed and their crushed remains form a thin layer surrounding the embryo and endosperm.…”

The Inter-Relations of Catalase, Respiration, After-Ripening, and Germination in Some Dormant Seeds of the Polygonaceae

“…According to Woodcock (1914) the seed of the polygonums at maturity is enclosed in a thick hard coat, consisting of the cutinized epidermal layer and the compressed inner layers of the ovary. The integuments have become closely compressed and their crushed remains form a thin layer surrounding the embryo and endosperm.…”

Viability and Dormancy in Seeds of Polygonum Amphibium L., P. Coccineum Muhl. And P. Hydropiperoides Michx.

“…To period he obtained 85 per cent germination from these workers a knowledge of the behavior of the seed of P. amphibium whose "coats" had been rupseeds is important when propagating these species. The embryo is surrounded when stored dry at different temperatures and gave by an aleurone layer and lies outside a starchy en-poor germination after being stored in water at dosperm in an angle of the seed (Woodcock, 1914). Muenscher (1936) stored achenes of two under certain conditions and a knowledge of the be-lots of P. amphibium dry and in water at both room havior of their seeds is essential when they are to temperatures and 2°C.…”

“…The embryo is surrounded when stored dry at different temperatures and gave by an aleurone layer and lies outside a starchy en-poor germination after being stored in water at dosperm in an angle of the seed (Woodcock, 1914). Seed of all lots were dormant at maturity and These three species flourish and reproduce under none germinated until they had been subjected to amphibious conditions.…”

“…Seed of all lots were dormant at maturity and These three species flourish and reproduce under none germinated until they had been subjected to amphibious conditions. The embryo is surrounded when stored dry at different temperatures and gave by an aleurone layer and lies outside a starchy en-poor germination after being stored in water at dosperm in an angle of the seed (Woodcock, 1914). are dormant or exhibit delayed germination at ma- Martin and Uhler (1939) recommended that turity.…”