Morphological and anatomical evaluation of adult and juvenile leaves of olive plants |
| |
Authors: | Inmaculada Moreno-Alías Lorenzo León Raúl de la Rosa Hava F Rapoport |
| |
Institution: | (1) IFAPA Centro “Alameda del Obispo”, Avda. Menéndez Pidal s/n, 14004 Córdoba, Spain;(2) Instituto de Agricultura Sostenible, C.S.I.C, Apdo. 4084, 14080 Córdoba, Spain |
| |
Abstract: | The olive tree (Olea europaea L.), like many other woody plants, has a long juvenile period in which the plant is not able to produce flowers. Knowledge
of the moment when the plant is capable of flowering is important for breeding programs and also for determining the physiological
basis for sexual reproductive behavior, but currently the only indicator of that moment is the actual flowering. In many species,
the juvenile-to-adult phase shift includes changes in leaf structure known as heteroblasty, that is, varied form of successive
leaves on the same plant. Some differences have been observed between juvenile and adult olive leaves, particularly in size
and form, but to our knowledge, no complete systematic study has been carried out. In this research, we measured size, morphology
and anatomy for juvenile and adult leaves of olive plants grown from seeds. Differences were found in most of the parameters
studied, including leaf size, form, mesophyll thickness, layers of palisade parenchyma and quantity of peltate trichomes,
which were generally significant but overlapping between the two leaf types. The most consistent and striking difference was
the presence of an organized layer of subepidermal cells only in the abaxial mesophyll of adult leaves. This characteristic
could be a simple and effective criterion of phase change in the olive tree. |
| |
Keywords: | Olea europaea Anatomy Morphology Heteroblasty Mesophyll |
本文献已被 SpringerLink 等数据库收录! |
|