'MPM1': a macadamia hybrid showing breakdown of biological rhythm in morphogenesis
Macadamia is an Australian native genus, comprising of four species.
Commercial cultivars for the production of macadamia nuts are derived from two species, M. tetraphylla and M. integrifolia. The different species of Macadamia have unique leaf and flowering patterns, due to inherent biological rhythms.
Usually, M. tetraphylla has four leaves in a whorl, while the other species have three leaves per whorl.
All species produce 1-2 florets at each raceme node.
We identified a multi-pistillate macadamia genotype ('MPM1') with irregular leaf pattern and floral architecture.
The genotype is a progeny of cultivars 'HAES 705' and 'NG18'. In this article, we described the characteristics of this plant and irregularities of its biological rhythm, including the number of leaves per whorl, ranging from 1 to 9, and variation in the number of pistils per floret.
This irregular biological rhythm occurred during both vegetative and reproductive growth phases.
Future molecular or epigenetic studies could determine the origin and mechanism of these unusual characteristics.
Alam, M.M., Neal, J., Howell, E., Russell, D. and Topp, B.L. (2018). 'MPM1': a macadamia hybrid showing breakdown of biological rhythm in morphogenesis. Acta Hortic. 1205, 631-636
DOI: 10.17660/ActaHortic.2018.1205.78
https://doi.org/10.17660/ActaHortic.2018.1205.78
DOI: 10.17660/ActaHortic.2018.1205.78
https://doi.org/10.17660/ActaHortic.2018.1205.78
plant morphogenesis, leaf pattern, floral architecture, Macadamia
English
1205_78
631-636
- Division Tropical and Subtropical Fruit and Nuts
- Division Physiology and Plant-Environment Interactions of Horticultural Crops in Field Systems
- Division Vegetables, Roots and Tubers
- Division Protected Cultivation and Soilless Culture
- Division Horticulture for Development
- Division Precision Horticulture and Engineering
- Division Landscape and Urban Horticulture
- Division Plant Genetic Resources and Biotechnology
- Division Horticulture for Human Health