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Testa vs Tegmen - What's the difference?

testa | tegmen |

As nouns the difference between testa and tegmen

is that testa is head while tegmen is (biology) a covering or integument.

testa

English

Noun

  • (botany) A seed coat.
    • The testa develops from the tissue, the integument, originally surrounding the ovule.
  • * 1840 , James Scott Bowerbank, A History of the Fossil Fruits and Seeds of the London Clay , page 30,
    • The seeds are furnished with a reticulated testa , very much in appearance like that of the seeds of two closely-allied pericarps in the cabinet of my friend Mr. Ward, of Wellclose-square, the names of which I have been unable to obtain, but which present strong evidence of belonging to the Malvaceæ .
  • * 1969 , C. W. Bennett, Seed Transmission of Plant Viruses'', Alison Smith, ''Advances in Virus Research , Volume 14, page 224,
    • In tests with the Lincoln and Virginia varieties of cowpea, Crowley (1959) found that, in plants infected with bean southern mosaic virus before blossoming, the virus was present in nearly 100% of the testae and endosperms of seeds of both varieties, but could not be detected in the embryos.
  • * 1977 , Commonwealth Scientific and Industrial Research Organization, Australian Journal of Plant Physiology , page 354,
    • Thus, two conditions must be satisfied for the testas' to have this effect: contact between the '''testas''' and the radicle, and the presence of at least half of the ' testas .
  • * 2005 , D. W. Dickson, D. De Waele, Nematode Parasites of Peanut'', Michel Luc, Richard A. Sikora, John Bridge, ''Plant Parasitic Nematodes in Subtropical and Tropical Agriculture , page 419,
    • A.[Aphelenchoides] arachidis is a parasite of pods, testae, roots and hypocotyls, but not the cotyledons, embryos or other parts of the plant (Bos, 1977a; Bridge et al., 1977).
  • * 2007 , J. Smartt, Evolution of American Phaseolus beans under domestication'', Peter John Ucko, G. W. Dimbleby (editors), ''The Domestication and Exploitation of Plants and Animals , page 458,
    • One of the most remarkable features of cultivated beans is the enormous range of testa colours and patterns which can be found.
  • (marine biology) The external calciferous shell, or endoskeleton, of an echinoderm; the test.

    • Anagrams

    * ----

    tegmen

    English

    Noun

    (tegmina)
  • (biology) A covering or integument.
    • ----