John L. Maas, Merle M. Millard, M. J. Line, Gene J. Galletta
Strawberry (Fragaria × ananassa Duch.) flower buds prior to anthesis, bloom, developing recepticle, and fruit from green, white to red-ripe stages were examined by spin-echo nuclear magnetic resonance (NMR) microimaging of water in tissues. Proton density and proton relaxation times (T2) were also determined. A central core surrounded by vascular tissue and vascular traces extending to developing achene positions were evident in NMR images. Vascular traces were especially evident in immature fruit. Achences in immature fruit imaged, but those of mature fruit did not image. The NMR images also suggest that there was more water in the core (higher proton density), but T2 times were similar to those of the fleshly cortex, indicating the same degree of freeness or boundness of water in both tissues. Mechanical injury due to bruising also was evident in NMR images.
Maas, John L., Millard, Merle M., Line, M. J. and Galletta, Gene J. (1993). NUCLEAR MAGNETIC RESONANCE MICROIMAGING OF STRAWBERRY FRUIT. Acta Hortic. 348, 375-377
DOI: 10.17660/ActaHortic.1993.348.71
Fragaria X ananassa, non-invasive imaging, fruit anatomy, NMR micro-imaging, NMR microscopy

Acta Horticulturae