caa a22 4500 467943745 CHVBK 20180405193734.0 cr unu---uuuuu 170328e20041001xx s 000 0 eng 10.1007/s10725-004-3837-z doi (NATIONALLICENCE)springer-10.1007/s10725-004-3837-z (NATIONALLICENCE)springer-10.1023/B:GROW.0000049416.62133.b2 Development and senescence of Grevillea ‘Sylvia' inflorescences, flowers and flower parts [Elektronische Daten] [Setyadjit Setyadjit, Daryl Joyce, Donald Irving, David Simons] To characterise the physiology of development and senescence for Grevillea ‘Sylvia' floral organs, respiration, ethylene production and ACC concentrations in harvested flowers and flower parts were measured. The respiration rate of harvested inflorescences decreased over time during senescence. In contrast, both ethylene production and ACC concentration increased. Individual flowers, either detached from cut inflorescences held in vases at 20°C or detached from in planta inflorescences at various stages of development, had similar patterns of change in ACC concentration and rates of respiration and ethylene production as whole inflorescences. The correlation between ACC concentration and ethylene production by individual flowers detached from cut inflorescences held in vases was poor (r2=0.03). The isolated complete gynoecium (inclusive of the pedicel) produced increasing amounts of ethylene during development. Further sub-division of flower parts and measurement of their ethylene production at various stages of development revealed that the distal part of the gynoecium (inclusive of the stigma) had the highest rate of ethylene production. In turn, anthers had higher rates of ethylene production and also higher ACC concentrations than the proximal part of the gynoecium (inclusive of the ovary). Rates of ethylene production and ACC concentrations for tepal abscission zone tissue and adjacent central tepal zone tissue were similar. ACC concentration in pollen was similar to that in senescing perianth tissue. Overall, respiration, ethylene and ACC content measurements suggest that senescence of G. ‘Sylvia' is non-climacteric in character. Nonetheless, the phytohormone ethylene is produced and evidently mediates normal flower development and non-climacteric senescence processes. Kluwer Academic Publishers, 2004 ACC (1-aminocyclopropane-1-carboxylic acid) nationallicence Ethylene nationallicence Flower nationallicence Grevillea nationallicence Respiration nationallicence Senescence nationallicence Setyadjit Setyadjit Centre for Native Floriculture, School of Agronomy and Horticulture, The University of Queensland, 4343, Gatton, Qld, Australia aut Joyce Daryl Centre for Native Floriculture, School of Agronomy and Horticulture, The University of Queensland, 4343, Gatton, Qld, Australia aut Irving Donald Centre for Native Floriculture, School of Agronomy and Horticulture, The University of Queensland, 4343, Gatton, Qld, Australia aut Simons David Centre for Native Floriculture, School of Agronomy and Horticulture, The University of Queensland, 4343, Gatton, Qld, Australia aut Plant Growth Regulation Kluwer Academic Publishers 44/2(2004-10-01), 133-146 0167-6903 44:2<133 2004 44 10725 https://doi.org/10.1007/s10725-004-3837-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10725-004-3837-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Setyadjit Setyadjit Centre for Native Floriculture, School of Agronomy and Horticulture, The University of Queensland, 4343, Gatton, Qld, Australia aut NATIONALLICENCE 700 1- Joyce Daryl Centre for Native Floriculture, School of Agronomy and Horticulture, The University of Queensland, 4343, Gatton, Qld, Australia aut NATIONALLICENCE 700 1- Irving Donald Centre for Native Floriculture, School of Agronomy and Horticulture, The University of Queensland, 4343, Gatton, Qld, Australia aut NATIONALLICENCE 700 1- Simons David Centre for Native Floriculture, School of Agronomy and Horticulture, The University of Queensland, 4343, Gatton, Qld, Australia aut NATIONALLICENCE 773 0- Plant Growth Regulation Kluwer Academic Publishers 44/2(2004-10-01), 133-146 0167-6903 44:2<133 2004 44 10725 NATIONALLICENCE 856 40 https://doi.org/10.1023/B:GROW.0000049416.62133.b2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- ␣ Setyadjit Centre for Native Floriculture, School of Agronomy and Horticulture, The University of Queensland, 4343, Gatton, Qld, Australia aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer