The relationship between basipetal auxin transport and calcium allocation in vegetative and reproductive flushes in avocado

• Published in: Scientia horticulturae Vol. 41; no. 1; pp. 27 - 34
• Main Authors: Cutting, J.G.M., Bower, J.P.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.12.1989; Elsevier
• Subjects: Agronomy. Soil science and plant productions; avocado; Biological and medical sciences; calcium; Deficiencies. Phytotoxicity of elements. Salinity; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; IAA; partitioning, radioimmunoassay; Soil-plant relationships. Soil fertility. Fertilization. Amendments; IAA; avocado; calcium; partitioning, radioimmunoassay; Subtropical zone; Auxin; Calcium; Biological transport; Resource allocation; Postharvest disease; Persea gratissima; Fruit crop; Dicotyledones; Indoleacetic acid; Radioimmunoassay; Angiospermae; Plant growth substance; Spermatophyta; Vigor; Fruit tree; Lauraceae; Biological accumulation; Physiological disorder
• ISSN: 0304-4238; 1879-1018
• DOI: 10.1016/0304-4238(89)90046-0

Indole-3-acetic acid (IAA) export and 45Ca uptake by excised avocado flower, fruitlet and shoots from the vegetative flush were determined in conditions which limited transpiration flow to a minimum. Treatments using auxin transport inhibitors were included to ascertain if IAA played a role in the allocation of Ca. IAA levels were determined using radioimmunoassay. IAA export and 45Ca uptake were strongest for the vegetative flush and weaker for the reproductive structures for the first 5 weeks after flowering. The competition for and control of Ca partitioning is discussed.