scholarly journals The Role of Ethylene and Pollination in Petal Senescence and Ovary Growth of Brodiaea

1991 ◽  
Vol 116 (1) ◽  
pp. 68-72 ◽  
Author(s):  
Susan S. Han ◽  
Abraham H. Halevy ◽  
Michael S. Reid
Keyword(s):  
Ethylene Synthesis ◽  
Petal Senescence ◽  
Silver Thiosulfate ◽  
Stigma Surface ◽  
Petal Growth ◽  
Ovary Growth

Unpollinated brodiaea (Triteleia laxa Benth.; syn. Brodiaea laxa) flowers produced no measurable C2 H4 during their entire lives. Treatment with C2 H4 (0.03 μl·liter -1) induced senescence of open flowers, completely inhibited opening of buds and petal growth, and promoted ovary growth. Silver thiosulfate had no effect on flowers kept in air but counteracted the effects of applied C, H.. The effect of C2 H4 on ovary growth seems to be indirect, via promotion of petal senescence and mobilization of the petal's metabolites to the ovary. Brodiaea flowers are protandrous; the stigma appears to be receptive (as judged by a pollination-induced burst of ethylene synthesis) only when the petals start to senesce. At this stage, papillae on the stigma surface elongated and separated.

Corrigendum to: Auxin is required for pollination-induced ovary growth in Dendrobium orchids

2006 ◽  
Vol 33 (10) ◽  
pp. 981 ◽  
Author(s):  
Saichol Ketsa ◽  
Apinya Wisutiamonkul ◽  
Wouter G. van Doorn
Keyword(s):  
Auxin Transport ◽  
Isobutyric Acid ◽  
Signalling Pathway ◽  
Aminooxyacetic Acid ◽  
Ethylene Synthesis ◽  
Transport Inhibitor ◽  
Auxin Signalling ◽  
Auxin Transport Inhibitor ◽  
Ethylene Action ◽  
Ovary Growth

In Dendrobium and other orchids the ovule becomes mature long after pollination, whereas the ovary starts growing within two days of pollination. The signalling pathway that induces rapid ovary growth after pollination has remained elusive. We placed the auxin antagonist �-(p-chlorophenoxy) isobutyric acid (PCIB) or the auxin transport inhibitor 2,3,5-triiodobenzoic acid (TIBA) on the stigma, before pollination. Both treatments nullified pollination-induced ovary growth. The ovaries also did not grow after similar stigma treatment with 1-methylcyclopropene (1-MCP), AgNO3 (both inhibitors of ethylene action), aminooxyacetic acid (AOA) or CoCl2 (which both inhibit ethylene synthesis), before pollination. Pollination could be replaced by placement of the auxin naphthylacetic acid (NAA) on the stigma. All mentioned inhibitors nullified the effect of NAA, indicating that if auxin is the initiator of ovary growth, it acts through ethylene. The results suggest that the pollination effect on ovary growth requires auxin (at least auxin transport and maybe also auxin signalling), and both ethylene synthesis and ethylene action.

scholarly journals 125 THE ROLE OF ETHYLENE IN THE DEVELOPMENT OF CONSTANT-LIGHT INJURY OF POTATO

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 446c-446
Author(s):  
K. E. Cushman ◽  
T. W. Tibbitts
Keyword(s):  
Solanum Tuberosum ◽  
Leaf Tissue ◽  
Dry Weight ◽  
Light Period ◽  
Constant Light ◽  
Silver Thiosulfate ◽  
Ethylene Action ◽  
Teflon Film ◽  
Necrotic Spotting

Chlorosis and necrotic spotting develop on expanding leaves of particular cultivars of potato (Solanum tuberosum L.) when grown under constant light and temperature conditions. Plantlets of a constant-light sensitive cultivar, Kennebec, were planted into peat:vermiculite and established at 18C for 10 d under a 12 h light: 12 h dark photoperiod. Plants were then exposed to constant light and sprayed with 1 ml of either 0.5 mM silver thiosulfate (STS), an ethylene-action inhibitor, or water (as a control) every 2 days. Specific `target' leaflets, 5-10 mm in length at the beginning of the constant-light period, were harvested on days 5-9 of constant light, during injury development, and placed in bags made of Teflon film for IO-15 minutes to collect ethylene. Ethylene release and necrotic spotting increased as days of constant light increased for both water and STS-treated leaves, though STS-treated leaves produced slightly less ethylene and significantly less necrotic spotting than water-treated leaves. Ethylene release was correlated with extent of necrotic spotting. STS-treated plants exhibited greater dry weight and leaf area then water-treated plants. The results indicate that ethylene is not only produced by injured leaf tissue but, in addition, that ethylene may have a role in the development of constant-light injury symptoms.

scholarly journals Role of Ethylene in Opening and Senescence of Gladiolus sp. Flowers

1994 ◽  
Vol 119 (5) ◽  
pp. 1014-1019 ◽  
Author(s):  
Margrethe Serek ◽  
Rodney B. Jones ◽  
Michael S. Reid
Keyword(s):  
Ethylene Production ◽  
Synergistic Effects ◽  
Pulse Treatment ◽  
Fresh Weight ◽  
Flower Opening ◽  
Silver Thiosulfate ◽  
Ethylene Treatment ◽  
Cool Storage ◽  
Carbohydrate Depletion

The opening and senescence of gladiolus (Gladiolus sp.) florets was accompanied by climacteric or nonclimacteric patterns of respiration and ethylene production, depending on variety, and whether data were expressed on a fresh-weight or floret basis. A climacteric pattern of ethylene production by the youngest buds on the spike (which never opened) was stimulated by cool storage, and was not affected by holding the spikes in a preservative solution containing sucrose. Ethylene treatment had no effect on senescence of the florets of any of the cultivars tested. Pulse treatment of the spikes with silver thiosulfate (STS) improved floret opening but not the life of individual florets. Sucrose and STS had similar but not synergistic effects on floret opening, suggesting that STS improves flower opening in gladiolus by overcoming the effects of carbohydrate depletion.

Petal Senescence in Uncut Tithonia rotundifolia Blake: Role of Starch

2012 ◽  
Vol 2 (5) ◽  
pp. 22-23
Author(s):  
Ruby G Patel ◽  
◽  
Renuka J Desai ◽  
Archana U Mankad
Keyword(s):  
Petal Senescence

ROLE OF ETHYLENE IN OVARY GROWTH AND VASE LIFE OF DENDROBIUM ´POMPADOUR´ FLOWERS

2005 ◽  
pp. 71-76
Author(s):  
S. Ketsa ◽  
A. Wisutiamonkul ◽  
K. Roengmongkol
Keyword(s):  
Vase Life ◽  
Ovary Growth

The role of methionine recycling for ethylene synthesis in Arabidopsis

2006 ◽  
Vol 49 (2) ◽  
pp. 238-249 ◽  
Author(s):  
Katharina Bürstenbinder ◽  
Guillaume Rzewuski ◽  
Markus Wirtz ◽  
Rüdiger Hell ◽  
Margret Sauter
Keyword(s):  
Ethylene Synthesis
Sign in / Sign up

Export Citation Format

Share Document