Scutellum


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Related to Scutellum: coleoptile

scutellum

[skü′tel·əm]
(botany)
A rounded apothecium with an elevated rim found in certain lichens.
The flattened cotyledon of a monocotyledonous plant embryo, such as a grass.
(invertebrate zoology)
The third of four pieces forming the upper part of the thoracic segment in certain insects.
(vertebrate zoology)
One of the scales on the tarsi and toes of birds.

Scutellum

 

one of the principal organs in the embryo of grasses of the family Gramineae. During seed sprouting, the scutellum secretes enzymes that make soluble the reserve substances of the endosperm that nourish the developing embryo. Some botanists regard the scutellum as a cotyledon, and others as a modified axis of the embryo.

References in periodicals archive ?
Thorax: Thoracic dorsum shiny black, yellow hairs; pleural thorax covered by dense yellow hairs, yellow bristles look like stripe; scutellum inflated yellow, golden hairs
Scutellum dark red-brown, silver pruinose except for tiny lateral areas, fine dark red-brown setose (2 long apical macrosetae moderately differentiated).
Regeneration: Scutellum derived calli were shifted to a modified Murashige and Skoog"s (1962) medium supplemented with 3% sugar (sucrose, maltose or glucose) myo-inositol 100 mg/L, glycine 2 mg/L, nicotinic acid 0.
In this paper, hydroballochory utilizing the specialized calyx structure (the scutellum and under lip) is discussed.
The scutellum of immature half embryos were immersed in a full strength Agrobacterium suspension ([OD.
Scutellum rugosoareolate, rugae not as strong as mesoscutum, areoles smaller.
This report deals with the effects of three GRs, 2,4-D, picloram, and dicamba, on callus induction, callus regeneration capacity, and plant regeneration from scutellum cultures of four commercial durum cultivars: Ben, Maier, Munich, and Lebsock.
During each flush phase, an average of 30 female flies (see Appendix II for exact sample sizes) were sampled from each of the bottlenecked lines to obtain measurements on eight morphological traits using an ocular micrometer on a dissecting microscope (traits were wing length, wing width, head width, inner-eye separation, scutellum length, scutellum width, thoracic suture length, and metafemur length; see Bryant 1977, for a full description of these traits).
Head pronotum, scutellum, is dull ochraceous, thickly and densely punctured with dark brown tinge; eyes dark brown with outer border dull ochraceous; ocelli pale ochraceous; antennae brown; pronotum and scutellum streaked with dark and light stripes; apex of scutellum light brown, with few dark brown puncture; each segment of abdomen dark brown with middle portion light brown; membrane of hemelytra bright brown with dark veins; labium ochraceous except a little basal portion of 3rd and entire 4th segment are brown; legs ochraceous brown with dark patches.
Scutellum dark red-brown, largely apruinose except for small anteromedial area, fine white setose (apical macrosetae poorly differentiated).