Tocopherols modulate leaf vein arrangement and composition without impacting photosynthesis

Title:

Tocopherols modulate leaf vein arrangement and composition without impacting photosynthesis

Creator:

Stewart, J. J., Adams, William W., Cohu, C. M., and Demmig-Adams, Barbara

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:36607a42-0d81-4d6d-ad3a-ae944eaa5543
uuid:36607a42-0d81-4d6d-ad3a-ae944eaa5543
issn:0300-3604
doi:10.1007/s11099-017-0757-5

Subject:

vitamin E, foliar vasculature, leaf venation, vein density, vitamin E deficiency, xylem, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Growth of the tocopherol-deficient vte1 mutant and Col-0 wild type of Arabidopsis thaliana in a sunlit glasshouse revealed both similarities and differences between genotypes. Photosynthetic capacity and leaf mesophyll features did not differ between mutant and wild type. Likewise, the total volume of water conduits (tracheary elements, TEs), sugar conduits (sieve elements, SEs), and sugar-loading cells (companion and phloem parenchyma cells) on a leaf area basis were unaffected by tocopherol deficiency. However, tocopherol deficiency yielded smaller and more numerous minor veins with fewer phloem cells and smaller TEs, resulting in greater ratios of TEs to SEs. The smaller TEs in the vte1 mutant may present a decreased risk for cavitation under high evaporative demand or in response to freezing. In turn, compensation for fewer phloem cells and smaller TEs by more numerous veins may bolster resistance to cavitation at no cost to photosynthetic capacity., J. J. Stewart, W. W. Adams, C. M. Cohu, B. Demmig-Adams., and Obsahuje bibliografické odkazy

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

382-391

Source:

Photosynthetica | 2018 Volume:56 | Number:1

Harvested from:

CDK

Metadata only:

false