Hypoxic stress inhibits multiple aspects of the potato tuber wound response. [Solanum tuberosum L]

Journal Article · Tue May 01 00:00:00 EDT 1990 · Plant Physiology; (USA)

DOI:https://doi.org/10.1104/pp.93.1.264· OSTI ID:5950666

Butler, W; Cook, L; Vayda, M E ^[1]

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1. Univ. of Maine, Orono (USA)

Potato (Solanum tuberosum L.) tubers subjected to wounding under hypoxic stress do not synthesize RNA species that are induced in response to wounding in aerobic conditions. Further, wound-response proteins fail to be synthesized when wounded tubers are transferred to hypoxic conditions although messenger RNAs which encode them persist for many hours after transfer. Hypoxic stress also prevents the incorporation of ({sup 3}H)thymidine by wounded tubers that occurs in aerobic conditions. In contrast, hypoxic tubers accumulate and translate transcripts of genes whose products are involved in anaerobic metabolism whether or not they are wounded. Both the hypoxic response and the aerobic wound response preclude the synthesis of proteins encoded by messenger RNAs which accumulated during the tuberization process and which can be translated in vitro. Finally, wounding elicits the degradation of a subset of these tuberization-associated transcripts. These data indicate a complex and precise regulation of gene expression at several levels of macromolecular synthesis.

• OSTI ID: 5950666
• Journal Information: Plant Physiology; (USA), Vol. 93:1; ISSN 0032-0889
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
59 BASIC BIOLOGICAL SCIENCES
ANOXIA
BIOLOGICAL EFFECTS
SOLANUM
PHYSIOLOGY
BIOLOGICAL STRESS
GENE REGULATION
INHIBITION
THYMIDINE
TRACER TECHNIQUES
TRANSCRIPTION
TRITIUM COMPOUNDS
WOUNDS
AZINES
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INJURIES
ISOTOPE APPLICATIONS
MAGNOLIOPHYTA
MAGNOLIOPSIDA
NUCLEOSIDES
NUCLEOTIDES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PLANTS
PYRIMIDINES
RIBOSIDES
560300* - Chemicals Metabolism & Toxicology
550201 - Biochemistry- Tracer Techniques