Distribution, mechanism, and significance of the export of substances from the developing fruits of peas

Thesis/Dissertation · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6998020

Hamilton, D A

In the G2 line of peas (Pisum sativum L.) senescence and death of the apical bud occurs only in long days (LD) in the presence of fruits. Removal of the fruits prevents apical senescence. One possible reason for the senescence-inducing effect of fruit is that the fruits produce a senescence-inducing factor which moves to the apical bud and is responsible for the effect. For this to be possible there must be a transport mechanisms by which the material may move form the pods to the apex. The goal of this study was to determine the characteristics of pod export and elucidate the nature of the exported material. To examine the extent of fruit export, pods were labelled via photoassimilation of /sup 14/CO/sub 2/ at various ages and under either LD or short days (SD). For both photoperiods, less label was found to be exported to the apical bud during the onset of irreversible apical senescence than at other times. In addition, pods exported more of the total label fixed when grown under SD conditions, and more of the amount exported reached the apical bud in SD. Thus, the quantitative data do not support the idea of specific export of targeted senescence-inducing compounds.

• Research Organization: Cornell Univ., Ithaca, NY (USA)
• OSTI ID: 6998020
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
PISUM
CELL DIFFERENTIATION
PROTEINS
MEMBRANE TRANSPORT
TISSUE DISTRIBUTION
AGE DEPENDENCE
CARBON 14 COMPOUNDS
CARBON DIOXIDE
MERISTEMS
PEAS
PHOTOSYNTHESIS
TRACER TECHNIQUES
VISIBLE RADIATION
BACTERIA
BODY
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
FOOD
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LEGUMINOSAE
MICROORGANISMS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PLANT TISSUES
PLANTS
RADIATIONS
RHIZOBIUM
SYNTHESIS
TISSUES
VEGETABLES
550201* - Biochemistry- Tracer Techniques