Comment, Like, & Favorite
The Thorns Of Life
In botanical morphology, thorns, spines, and prickles are hard structures with sharp, or at least pointed, ends. In spite of this common feature, they differ in their growth and development on the plant; they are modified versions of different plant organs, stems, stipules, leaf veins, or hairs. In nontechnical usage, the terms may be synonymous.
It has been proposed that thorny structures may first have evolved as a defense mechanism in plants growing in sandy environments that provided inadequate resources for fast regeneration of damage. However, the suggestion was unsupported by any argument to discount the likelihood that spiny defences might have been developed as means of defence in say, resource-rich environments where herbivory might have been more intense than in the hypothesized sandy environments.
Not all functions of spines or glochids are limited to defence from physical attack by herbivores and other animals. In some cases, spines have been shown to shade or insulate the plants that grow them (e.g. saguaro cactus spines shade the apical meristem in summer and in members of the Opuntioideae glochids insulate the apical meristem in winter).
April 6th, 2013
Viewed 121 Times - Last Visitor from Beverly Hills, CA on 07/25/2014 at 4:33 PM
copy and paste to your website / blog - preview
thorns framed prints, thorn framed prints, spine framed prints, prickles framed prints, suffering framed prints, pain framed prints, sore framed prints, defense framed prints, strenght framed prints, power framed prints, nature framed prints, rose framed prints, roses framed prints, flower framed prints, flowers framed prints, life framed prints, lives framed prints, green framed prints, red framed prints, brown framed prints, plant framed prints, strong framed prints, crucifixion framed prints, god framed prints, jesus framed prints, thorns greeting cards, thorn greeting cards, spine greeting cards, prickles greeting cards, suffering greeting cards, pain greeting cards, sore greeting cards, defense greeting cards, strenght greeting cards, power greeting cards, nature greeting cards, rose greeting cards, roses greeting cards, flower greeting cards, flowers greeting cards, life greeting cards, lives greeting cards, green greeting cards, red greeting cards, brown greeting cards, plant greeting cards, strong greeting cards, crucifixion greeting cards, god greeting cards, jesus greeting cards, thorns prints, thorn prints, spine prints, prickles prints, suffering prints, pain prints, sore prints, defense prints, strenght prints, power prints, nature prints, rose prints, roses prints, flower prints, flowers prints, life prints, lives prints, green prints, red prints, brown prints, plant prints, strong prints, crucifixion prints, god prints, jesus prints, thorns posters, thorn posters, spine posters, prickles posters, suffering posters, pain posters, sore posters, defense posters, strenght posters, power posters, nature posters, rose posters, roses posters, flower posters, flowers posters, life posters, lives posters, green posters, red posters, brown posters, plant posters, strong posters, crucifixion posters, god posters, jesus posters
Web04 - 0.00 - 0.00 - 0.01 - 0.01 - 0.01 - 0.01 - 0.01 - 0.01 - 0.02 - 0.02 - 0.02 - 0.03 - 0.03 - 0.03 - 0.03 - 0.03 - 0.03 - 0.18