What is "geotropic"

Usage examples of "geotropic".

But in this latter case the lateral shoots are rendered apogeotropic, whereas with radicles the lateral ones are rendered geotropic.

Thirdly and lastly, radicles when they first protrude from the seed are always geotropic, and plumules or shoots almost always apogeotropic.

As soon as the confluent petioles protrude from the seed they bend down, as they are strongly geotropic, and penetrate the ground.

Vicia faba, circumnutation of radicle, 29, 30 --, of epicotyl, 3133 --, curvature of hypocotyl, 92 --, sensitiveness of apex of radicle, 132134 --, of the tips of secondary radicles, 154 --, of the primary radicle above the apex, 155158 --, various experiments, 135143 --, summary of results, 143151 --, power of an irritant on, compared with that of geotropism, 151154 Vicia faba, circumnutation of leaves, 233235 --, circumnutation of terminal leaflet, 235 --, effect of apogeotropism, 444 --, effect of amputating the tips of radicles, 523 --, regeneration of tips, 526 --, short exposure to geotropic action, 527 --, effects of amputating the tips obliquely, 528 --, of cauterising the tips, 529 --, of grease on the tips, 534 Vines, Mr.

Plants, also, were selected which were but feebly geotropic or apogeotropic, or had become so from having grown rather old.

Heliotropism, showed in the plainest manner that apogeotropic and geotropic, and probably diageotropic movements, are all modified forms of circumnutation.

We may therefore conclude that grease on the tips of the radicles of this Phaseolus somewhat delays and lessens the geotropic curvature of the part which ought to bend most.

Altogether twentynine radicles were operated on in the manner above described, and of these only a few showed any geotropic curvature within 24 h.