The Relationship between Nodal Aging and Juvenility of Papaya (Carica papaya L.)

Abstract

為探討'台農2號'番木瓜不同節齡與幼年性程度之關係，本研究調查不同節齡之側枝發育及其扦插發根力。結果顯示，番木瓜隨節位之增高，其掌狀葉片之製葉脈數增加，因此由裂葉脈數之多寡，可反應該部位幼年性之程度。而番木瓜之下端側枝之幼年性程度明顯高於上端者;且幼年性程度高的部位，其萌生側枝之扦插發根力較強。The degree of juvenility on papaya (Carica papaya L.) 'Tainung No.2' was studied in relation to the lateral shoot development and its rooting from cutting. Results showed that the number of leaflets in palmate-lobed leaves of papaya increased with nodal aging, which could reflect the degree of juvenility in different nodal orders. The rooting of cutting from lateral shoot tip of more juvenility had higher rooting percentage. Therefore, the lower lateral shoot with more juvenility degree than upper lateral shoot on papaya stem