ʻO ka neʻe ʻana o nā mea kanu ua hoihoi i nā mea noiʻi he nui. ʻO nā legumes kahi hui o nā mea kanu kaulana no ka hōʻike ʻana i nā neʻe lau like ʻole, me ka "nyctinastic movement," kahi e wehe ai nā lau i ke ao a pani i ka pō. ʻO nā neʻe like ʻana o nā mea kanu e like me nā neʻe ʻana i ka ʻulaʻula polū a me ka hoʻopā ʻana, e like me nā mea kanu maʻalahi e like me Mimosa pudica.
ʻO ka neʻe ʻana i nā hale lau ma muli o ka hana pinepine ʻana a hiki ke hoʻohuli ʻia palena manawa a me ka hookiekie ana o Hawaii nā pūnaewele, ʻo ia nā cell i loko o kahi hale i kapa ʻia ʻo pulvinus ma ke kumu o nā lau a me nā petioles. ʻO ia ʻano hoʻonui a hoʻihoʻi hou ʻia a me ka hoʻopaʻa ʻana he mea kakaikahi loa i loko o nā mea kanu, kahi i hoʻopuni ʻia e kahi paʻa. pā paia. Eia kekahi, ʻaʻole maopopo i ke ʻano o ka hiki i nā cell motor ke hoʻonui hou a hoʻihoʻi ʻia a hoʻopaneʻe.
Hoʻokumu ʻia nā pā hale kanu me nā microfibrils cellulose e hōʻemi a hoʻonui paha i ka pane ʻana i nā ʻokoʻa osmotic concentration ma waena o loko a me waho o ke kelepona. Eia naʻe,ʻo ka nui o ka hoʻololi i hiki ke hoʻouluʻia e anisotropy i ka hoʻonohonohoʻana i nā microfibrils cellulose hikiʻole ke wehewehe i ka piha piha o ana o ka pulvinus.
Ua nānā ʻia kahi hui noiʻi i alakaʻi ʻia e Miyuki Nakata a me Taku Demura ma ka Nara Institute of Science and Technology (NAIST) i nā ʻāpana keʻa o nā pulvinar motor cell mai Desmodium paniculatum me ka hoʻohana ʻana i ka microscopy laser confocal e noiʻi i ke ʻano o ka hoʻonui ʻana a me ka hoʻihoʻi hou ʻana o ka cell extension a contraction. Ua ʻike lākou i nā "slits" circumferential kū hoʻokahi i loko o ka paia o nā pūnaewele kaʻa me ka liʻiliʻi o ka cellulose. Ua mālama ʻia nā hale ma waena o ʻelua mau ʻohana legumes, me ka soybeans, kudzu a me nā mea kanu maʻalahi.
Ma ka hoʻoili ʻana i nā ʻāpana ʻiʻo mai nā pūnaewele kino cortical legume i nā hoʻonā o ka osmolarity ʻē aʻe, ua hoʻonui ʻia nā ʻāpana pulvinar i ka laulā, e hōʻike ana i kahi hana e hana ai. nā pā kanu kanu hiki ke loli i ka pane ʻana i nā ʻano osmolarity like ʻole.
Ma o ka hui pū ʻana o ka ʻike kikoʻī o ka paia cell cell, hoʻohālikelike kamepiula, a me ka nānā 'ana i nā pulvinar slits i loko o nā pūnaewele e ho'onui ana a me ka ho'opa'a 'ana, ua ho'oholo 'ia nā pulvinar slits he mau hale ma'alahi me ka mechanically e wehe a pani i ka wā o ka ho'onui a me ka ho'opa'a.
"Ua manaʻo ka hoʻohālike kamepiula e hoʻomaʻamaʻa nā pulvinar slits i ka hoʻonui ʻana i ka anisotropic i ke ala e kū pono ana i nā ʻāpana i ke alo o ke kaomi turgor," wahi a Miyuki Nakata. Ua hoʻohālikelike ka poʻe noiʻi i ka hana i nā ʻoki pololei a i ʻole nā ʻāpana i hoʻohana ʻia ma kirigami, kahi mea hana pepa Iapana, e hoʻonui ai i ka hoʻonui ʻia o ka pepa pepa.
No laila, ua manaʻo ka hui noiʻi ʻo kēia mau ʻāpana pulvinar he mau hale e hana e ʻae i ka neʻe ʻana o nā ʻenekini cortical motor ma mua o ka ʻae ʻia e nā microfibrils cellulose maʻamau i loko o ka paia cell.
"Ke hāʻawi nei mākou i kahi kuhiakau he kuleana ko nā pulvinar slits i ka neʻe ʻana o ka lau ma o ka hoʻihoʻi hou ʻana a me ka hoʻohuli ʻana o nā cell motor cortical i hui pū me nā mea ʻē aʻe e like me ka cellulose orientation, pectin-rich composition of the cell wall, the geometry of cortical motor cells, a ka actin cytoskeleton,” wahi a Miyuki Nakata.
Ua paʻiʻia ke aʻoʻana ma ka puke pai Ke Kohana Hana.