Philodendron Shift in Leaf Morphology

From: <pbunch at cox.net> on 2009.10.02 at 00:04:47(20133) So how do Philodendrons change from "juvenile' to 'mature" foliage morphologies? What are the mechanisms involved? Phil Medellin +More _______________________________________________ Aroid-L mailing list Aroid-L@www.gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l

From: ExoticRainforest <Steve at exoticrainforest.com> on 2009.10.02 at 13:41:53(20137) Phil, it is known as ontogeny and isthe same thing as a child "morphing" into an adult. When a baby isborn it looks little like an adult human but during the child'slife-long ontogeny it changes constantly until reaching adult hood. Even then the young adult continues to "age" and "morph". Plants do the exact same thing and constantly change as they age.. Youstart out with the extremely young sprout which begins to produce leafblades. That then turns into the juvenile form of the plant whenchanges to the pre-adult form and then the adult. As it become anadult it is capable of reproduction but will continue to change as itgrows. Plants high in the canopy look nothing like the same speciesfound near the ground but they are one and the same species. This mighthelp:http://www.exoticrainforest.com/Natural%20variation%20within%20aroid%20and%20%20plant%20species.html Steve HTML +More pbunch@cox.net wrote: So how do Philodendrons change from "juvenile' to 'mature" foliage morphologies? What are the mechanisms involved? PhilMedellin_______________________________________________Aroid-L mailing listAroid-L@www.gizmoworks.comhttp://www.gizmoworks.com/mailman/listinfo/aroid-l --------------020303060706040205090707

From: "Marek Argent" <abri1973 at wp.pl> on 2009.10.03 at 17:05:02(20146) Hello Phil, The same behavior you may observe in Syngonium and recently discusssed Cercestis. A lot depends on the conditions where they grow, if they are insufficient, plants will never grow adult, or even adult or adolescent plants may return to their juvenile form. Also many tuberous aroids when they are young, their leaves are entire and with age they become variously shaped. Two helpful links with Syngonium photos: http://www.wschowa.com/abrimaal/araceum/syngonium/syng1.htm http://www.wschowa.com/abrimaal/araceum/unid/abrisyng1.htm Marek HTML +More ----- Original Message ----- From: ExoticRainforest To: Discussion of aroids Sent: Friday, October 02, 2009 3:41 PM Subject: Re: [Aroid-l] Philodendron Shift in Leaf Morphology Phil, it is known as ontogeny and is the same thing as a child "morphing" into an adult. When a baby is born it looks little like an adult human but during the child's life-long ontogeny it changes constantly until reaching adult hood. Even then the young adult continues to "age" and "morph". Plants do the exact same thing and constantly change as they age.. You start out with the extremely young sprout which begins to produce leaf blades. That then turns into the juvenile form of the plant when changes to the pre-adult form and then the adult. As it become an adult it is capable of reproduction but will continue to change as it grows. Plants high in the canopy look nothing like the same species found near the ground but they are one and the same species. This might help:http://www.exoticrainforest.com/Natural%20variation%20within%20aroid%20and%20%20plant%20species.html Steve pbunch@cox.net wrote: So how do Philodendrons change from "juvenile' to 'mature" foliage morphologies? What are the mechanisms involved? PhilMedellin_______________________________________________Aroid-L mailing listAroid-L@www.gizmoworks.comhttp://www.gizmoworks.com/mailman/listinfo/aroid-l _______________________________________________ Aroid-L mailing list Aroid-L@www.gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l Nie znaleziono wirusa w tej wiadomosci przychodzacej. Sprawdzone przez AVG - www.avg.com Wersja: 8.5.409 / Baza danych wirus�w: 270.14.0/2406 - Data wydania: 09/30/09 18:56:00 ------=_NextPart_000_0085_01CA445C.69426780----==============�01270068027166683=

From: "Tom Croat" <Thomas.Croat at mobot.org> on 2009.10.07 at 03:05:01(20163) Dear Phil: I suspect that it is auxin controlled. As you may imagine younger plants grow scototropically one assumes because they have to find a tree, rock or wall. Once there they stop growing horizontally and grow upward, effectively toward the light, rather than away from the light. Therefore is is logical that there is an auxin conrol the makes this change of coarse. As the plants get closer to the source of light the internodes get shorter and broader reflecting this more favorable site for developing into an adult plant. Tom +More -----Original Message----- From: aroid-l-bounces@gizmoworks.com [mailto:aroid-l-bounces@gizmoworks.com] On Behalf Of pbunch@cox.net Sent: Thursday, October 01, 2009 7:05 PM To: aroid-l@gizmoworks.com; aroid-l@gizmoworks.com Subject: [Aroid-l] Philodendron Shift in Leaf Morphology So how do Philodendrons change from "juvenile' to 'mature" foliage morphologies? What are the mechanisms involved? Phil Medellin _______________________________________________ Aroid-L mailing list Aroid-L@www.gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l _______________________________________________ Aroid-L mailing list Aroid-L@www.gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l

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