NDLI: Spatial patterns of root branching and actinorhizal nodulation in Discaria trinervis seedlings.

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Spatial patterns of root branching and actinorhizal nodulation in Discaria trinervis seedlings.

Content Provider	Semantic Scholar
Author	Chaia, Eugenia Esther Raffaele, Estela
Copyright Year	2000
Abstract	The spatial patterns of root branching (topology) and actinorhizal nodulation of Discaria trinervis seedlings under natural and controlled conditions were analysed. The link, i.e. the root segment between either two branching points, or between a meristem and a branching point, was used as a structural unit of roots. Nodulated field plants displayed a random model of root topology and experimental plants without root symbionts a herringbone model (Fitter, 1991). The occurrence of these different root topologies would suggest that root symbionts influence root model architecture. The frequency distribution of the number of nodules per link on the main roots, for field collected plants, fitted a negative binomial model. Nodules were mainly situated near the main root's proximal end. The position (number of links counted from the main root's proximal end to the root apex) of lateral nodulated roots coincided with the nodulated area of the main root. A nodulation assay showed that the spatial pattern of root nodules was not a consequence of heterogeneous distribution of infective units of Frankia in the soil. The similar pattern of nodule position in field plants and experimental plants suggested that a regulation of nodulation might be also working in plants in their natural environment.
Starting Page	329
Ending Page	341
Page Count	13
File Format	PDF HTM / HTML
Volume Number	29
Alternate Webpage(s)	https://dalspace.library.dal.ca/bitstream/handle/10222/77773/VOLUME%2029-NUMBER%204-2000-PAGE%20329.pdf?isAllowed=y&sequence=1
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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