Your search for articles by authors with the surname Albre has found 1 article.

Articles of 3 pages or less are available for free to IAS members for download, and longer articles for $5. Articles from issues in 2016 and beyond are only available electronically, and are free to current members when they are logged in.

Please remember that all Aroideana articles are protected by copyright, and you may NOT distribute even electronic copies without permission from the authors or editor.


Year
Vol.
(Issue)
Pages
Author(s)
Title
2008
31
101-106
Marc Gibernau, J. Albre Size variations of flowering characters in Arum italicum (Araceae) (Buy)
 ABSTRACT: In Arum, bigger individuals should proportionally invest more in the female function (number or weight of female flowers) than the male. The aim of this paper is to quantify variations in reproductive characters (size of the spadix parts, number of inflorescences) in relation to plant and inflorescence sizes. The appendix represents 44% of the spadix length. The female zone length represents 16.5% of the spadix length and is much longer than the male zone (6%). Moreover these three spadix zones increase with plant vigour indicating an increasing investment into reproduction and pollinator attraction. It appears that the length of appendix increased proportionally more than the lengths of the fertile zones. On average an inflorescence counts 156 male flowers and 61 female flowers which result in a male-biased floral ratio in A. italicum. The numbers of male and female flowers increased significantly with the spadix size but differently according to the gender, the number of female flowers increasing faster than male: on the other hand this effect was marginally significantly (p = .08). This relative gender difference of flower number increase is visualised by a significant decrease of the maleness floral ratio with spadix size.