Photosynthate partitioning during flowering in relation to senescence of spinach

Conference · Tue May 01 00:00:00 EDT 1990 · Plant Physiology, Supplement; (USA)

OSTI ID:5628009

Sklensky, D; Davies, P J ^[1]

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1. Cornell Univ., Ithaca, NY (USA)

Male spinach plants are frequently cited as a counter-example to the nutrient drain hypothesis. Photosynthate partitioning in both male and female plants was examined. Leaves just below the inflorescences in plants at various stages of flowering were labelled with {sup 14}CO{sub 2} and the photosynthate allowed to partition for three hours. The leaves, flowers and stems of the inflorescence, and the other above ground vegetative tissue were harvested. These parts were combusted in a sample oxidizer for the collection of the {sup 14}CO{sub 2}. Allocation to the male and female flowers at very early stages are similar. As the flowers develop further, male flowers receive more photosynthate than do female flowers in early fruit production. Thus it is possible that nutrient drain to the flowers in male spinach plants is sufficient to account for senescence.

• OSTI ID: 5628009
• Report Number(s): CONF-9007196-; CODEN: PPYSA
• Journal Information: Plant Physiology, Supplement; (USA), Vol. 93:1; Conference: Annual meeting of the American Society of Plant Physiologists, Indianapolis, IN (USA), 29 Jul - 2 Aug 1990; ISSN 0079-2241
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
PHOTOSYNTHESIS
BIOCHEMICAL REACTION KINETICS
CARBON 14 COMPOUNDS
FLOWERS
SPINACH
TRACER TECHNIQUES
CHEMICAL REACTIONS
FOOD
ISOTOPE APPLICATIONS
KINETICS
LABELLED COMPOUNDS
MAGNOLIOPHYTA
MAGNOLIOPSIDA
PHOTOCHEMICAL REACTIONS
PLANTS
REACTION KINETICS
SYNTHESIS
VEGETABLES
550201* - Biochemistry- Tracer Techniques
551000 - Physiological Systems