Cellular and Ultrastructural Changes in Mesophyll and Bundle Sheath Cells of Maize in Response to Water Stress | Zendy

Kenneth L. Giles | Zendy; Michael F. Beardsell | Zendy; Daniel Cohen | Zendy

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Cellular and Ultrastructural Changes in Mesophyll and Bundle Sheath Cells of Maize in Response to Water Stress

Author(s) -

Kenneth L. Giles,

Michael F. Beardsell,

Daniel Cohen

Publication year - 1974

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.54.2.208

Subject(s) - vascular bundle , ultrastructure , abscisic acid , vacuole , water stress , biology , botany , starch , cytoplasm , microbiology and biotechnology , chemistry , biophysics , biochemistry , gene

Ultrastructural changes were correlated with leaf water potential, relative water content, and abscisic acid levels in the leaf. Mesophyll cells were more prone to damage than bundle sheath cells at a leaf water potential of -18.5 bars. Tonoplast breakdown and cell disruption occurred in 25% of the mesophyll cells. On rewatering, these disrupted cells did not recover. In bundle sheath cells, starch, lost at about -13.5 bars leaf water potential, reappeared within 2.5 hours of rewatering.

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