The dehiscent legumes of Chloroleucon chacoense (Leguminosae,
Mimosoideae) are highly predated. The
seeds of an intermediate type (neither orthodox, nor recalcitrant)remain in latency until the rainy
station start can germinate efficiently when are imbibed 36 h in water before the
sown, reaching similar % than those treated with sand paper or sulphuric acid.
The seeds lose their germinability when are treated with warm water, perhaps
because it kills the embryo. The seedlings are
developed in a high percentage (92%) although they do not
receive scarification treatments. The scarified seeds increase their weight
more than the no scarified, as the Baskin Index denotes. The ANOVA and MTG show
that the mechanical and chemical treatments allow the seeds to germinate till
24 h since the sown. The “t” test highlights that the no scarified seeds
exhibit high difference of weight only at 24 h since the sown; perhaps the
seeds need that lapse of time to imbibe to start the germination. Between the unhealthy seeds,
those with arrested development constitute a high percentage, and perhaps some problems in
the reproductive system exist. The germination is epigeal, phanerocotyledonar,
with photosynthesizing cotyledons,
and the seedlings have two sub-opposite protophylls
(one pinnate, the other bipinnate) and two or more alternate, bipinnate
eophylls. This fact implies that the classification commonly used does not
cover the variability existent in the Leguminosae. Studies are needed to elucidate the origin of the low density of
individuals because the species is included in the RED BOOK.
Cite this paper
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