1 / 8

Morphological structure and water status in bulbs during

Morphological structure and water status in bulbs during their transition from dormancy to active growth: Visualization by NMR imaging. Rina Kamenetsky Hanita Zemah Annette van der Toorn Haim D. Rabinowitch Henk van As Peter Bendel accepted by J. exp. Bot.

camille-stevens
Download Presentation

Morphological structure and water status in bulbs during

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Morphological structure and water status in bulbs during their transition from dormancy to active growth: Visualization by NMR imaging Rina Kamenetsky Hanita Zemah Annette van der Toorn Haim D. Rabinowitch Henk van As Peter Bendel accepted by J. exp. Bot.

  2. Tulip bulbs (Tulipa gesneriana L.) • World wide use of tulip as ornamental plant • Needs a cold period during dormancy to facilitate normal development and flowering • Fundamental knowledge about bulb dormancy and growth is limited

  3. Purpose of the project: To determine if significant differences in water status between bulbs stored at 4 oC and at 20 oC can be observed using MRI. Mainly using: • Visible morphological changes in the images • Proton density determination • R2 measurements (1/T2) • ADC measurements (reflecting proton mobility) • R1 measurements (1/T1)

  4. Morphological MR image of tulip bulb scales bud basal plate 1 cm Resolution 350 x 350 x 700 mm

  5. Single parameter images of the tulip bulb Amp of R1 Amp of R2 Amp of ADC 0.033 0.025 0.033 0 0 0 2.5 30 2.5e-9 0 0 0 R1 image R2 image ADC image

  6. 7 20 oC 4o C 30 20 oC 4 oC amplitude Time- dependent change in R2 for two bulbs R2 Time- dependent change in amplitude for two bulbs 0 0 start 2 weeks 4 weeks 8 weeks 12weeks

  7. Planted bulbs (10 days after planting) 4 oC 20 oC

  8. Conclusions • MR parameters such as R2 and ADC can be used to observe differences between chilled and non-chilled bulbs • MRI needs to be combined with histology to understand the observed changes in water status • The majority of changes in water status take place between 2 and 8 weeks after storage

More Related