scholarly journals Compatible and incompatible pollination and the senescence and ovary growth of Dendrobium flowers

2013 ◽  
Vol 3 (1) ◽  
pp. 35-42
Author(s):  
Kanjana Luangsuwalai ◽  
Robert E. Paull ◽  
Saichol Ketsa
Keyword(s):  
Incompatible Pollination ◽  
Ovary Growth

Preanthesis changes in freeze resistance, relative water content, and ovary growth preempt bud phenology and signify dormancy release of sour cherry floral buds

Planta ◽  
2021 ◽  
Vol 254 (4) ◽  
Author(s):  
Laura Hillmann ◽  
Mokhles Elsysy ◽  
Charity Goeckeritz ◽  
Courtney Hollender ◽  
Nikki Rothwell ◽  
...  
Keyword(s):  
Water Content ◽  
Relative Water Content ◽  
Sour Cherry ◽  
Dormancy Release ◽  
Freeze Resistance ◽  
Floral Buds ◽  
Relative Water ◽  
Bud Phenology ◽  
Ovary Growth

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.

Ethylene production and post-pollination development in Dendrobium flowers treated with foreign pollen

2001 ◽  
Vol 28 (5) ◽  
pp. 409 ◽  
Author(s):  
Saichol Ketsa ◽  
Kanokporn Bunya-atichart ◽  
Wouter G. van Doorn
Keyword(s):  
Carboxylic Acid ◽  
Ethylene Production ◽  
Acc Synthase ◽  
Aminooxyacetic Acid ◽  
Foreign Pollen ◽  
Incompatible Pollen ◽  
Ovary Growth

Dendrobium ‘Pompadour’ flowers fade early following pollination. This is associated with increased ethylene production and early epinasty. These effects are also produced by application of 1-aminocyclopropane-1-carboxylic acid (ACC) on the stigma. Pollen (one anther each) from Ruellia tuberosa L. (Acanthaceae) and Caesalpinia pulcherrima (L.) Sw. (Fabaceae) also increased ethylene production and caused early epinasty and fading. Pollen of Hibiscus schizopetalus (Mast.) Hook.f. (Malvaceae), in contrast, had no effect. R. tuberosa pollen increased ACC concentration and ACC synthase activity of the orchid flowers. Aminooxyacetic acid (AOA) pretreatment prior to R. tuberosa pollination prevented early fading, epinasty and the increase in ethylene production. It also prevented the increase in ACC concentration, and ACC synthase activity. Ovary growth was stimulated by Dendrobium ‘Pompadour’ pollinia, not by any of the incompatible pollen. Applied ACC did not promote ovary growth. It is concluded that incompatible pollen can hasten senescence and epinasty by increasing ACC synthase activity and ethylene production. Ovary growth, in contrast, is apparently not primarily regulated by ethylene.

Developmental landmarks during floral ontogeny of jalapeño chili pepper (Capsicum annuum L.) and the effect of gibberellin on ovary growth

2017 ◽  
Vol 30 (3) ◽  
pp. 119-129 ◽  
Author(s):  
R. Sandoval-Oliveros ◽  
L. Guevara-Olvera ◽  
J. P. Beltrán ◽  
C. Gómez-Mena ◽  
G. Acosta-García
Keyword(s):  
Capsicum Annuum ◽  
Chili Pepper ◽  
Floral Ontogeny ◽  
Capsicum Annuum L ◽  
Ovary Growth

scholarly journals Observations on impact of stunting on breeding performance of farmed rohu Labeo rohita (Hamilton, 1822)

2021 ◽  
Vol 68 (1) ◽  
Author(s):  
P. P. Suresh Babu ◽  
P. Srinivasa Rao ◽  
J. Krishna Prasad ◽  
Rupam Sharma ◽  
A. M. Babitha Rani ◽  
...  
Keyword(s):  
Detrimental Effect ◽  
Labeo Rohita ◽  
Gonadosomatic Index ◽  
Growth Enhancement ◽  
Breeding Performance ◽  
Relative Fecundity ◽  
Absolute Fecundity ◽  
Development Period ◽  
Hatching Percentage ◽  
Ovary Growth

Breeding performance of stunted rohu Labeo rohita (Hamilton, 1822) was compared with normally reared rohu. Randomly selected stunted and normal fishes were tagged and reared together in a single earthen pond for broodstock development. Both groups exhibited growth enhancement during the broodstock development period, though normal fishes were found larger in size than the stunted fishes, after the rearing period. Gonadosomatic Index (GSI) of female fishes indicated a similar trend of ovary growth in both the groups. Breeding performances of the broodstocks were evaluated by induced breeding trials. Parameters such as absolute fecundity, relative fecundity, number of spawns produced and hatching percentage were significantly higher (p<0.05) (almost double) in normal fishes than the stunted fishes. The present results indicate that the stunting process (6 months) is having detrimental effect on the breeding performance of rohu and thus stunted fishes are not ideal for broodstock development.

scholarly journals Hormonal Changes after Compatible and Incompatible Pollination in Theobroma cacao L.

HortScience ◽  
1997 ◽  
Vol 32 (7) ◽  
pp. 1231-1234 ◽  
Author(s):  
R. Paul Baker ◽  
Karl H. Hasenstein ◽  
Michael S. Zavada
Keyword(s):  
Pollen Tube ◽  
Theobroma Cacao ◽  
Hormonal Changes ◽  
Ethylene Evolution ◽  
Incompatible Pollen ◽  
Incompatibility System ◽  
Incompatible Pollination ◽  
Compatible Pollinations ◽  
Indole 3 Acetic Acid ◽  
Theobroma Cacao L

In order to characterize the self-incompatibility system in Theobroma cacao, the levels of ethylene, indole-3-acetic acid (IAA), and abscisic acid (ABA) were determined after pollination with compatible and incompatible pollen and in unpollinated flowers. Pollen tube growth rates after incompatible and compatible pollinations were identical, and the majority of the pollen tubes reached the ovules between 12 and 20 hours after pollination. ABA levels rose in incompatibly pollinated flowers, and fell in compatibly pollinated flowers, prior to pollen tube—ovule contact. Ethylene evolution remained stable in compatibly pollinated flowers and rose in incompatibly pollinated flowers. IAA concentrations increased in compatibly pollinated flowers, and remained stable in incompatibly pollinated flowers after pollination and subsequent to pollen tube—ovule contact.

scholarly journals Sexual Maturity Can Double Heart Mass and Cardiac Power Output in Male Rainbow Trout

1992 ◽  
Vol 171 (1) ◽  
pp. 139-148 ◽  
Author(s):  
CRAIG E. FRANKLIN ◽  
PETER S. DAVIE
Keyword(s):  
Rainbow Trout ◽  
Body Mass ◽  
Power Output ◽  
Cardiac Performance ◽  
Mature Male ◽  
Perfused Heart ◽  
Cardiac Power ◽  
Heart Preparation ◽  
Ovary Growth

Mature male rainbow trout have significantly higher relative ventricle masses (RVM, ventricle mass as a percentage of body mass) than do immature males or females. Hatchery-reared maturing male trout had a mean RVM of 0.139%, whereas females had an RVM of only 0.074 %. Moreover, as males matured and their testes grew from 0.07 to 3.92 % of body mass, RVM more than doubled. In female trout no such heart growth occurred; RVM remained unchanged during the period of ovary growth. Cardiac performance was assessed using an in situ perfused heart preparation. Mature male trout have larger ventricles and could generate significantly greater maximum cardiac power output per kilogram body mass than could immature males or females. This enhanced cardiac performance by the mature males was attributable to delivery of greater cardiac outputs (through larger stroke volumes) and an increased ability of the heart to work against higher output pressures. Power output per gram ventricle mass was similar in both sexes. Note: Present address: Department of Zoology, University of Queensland, Brisbane 4072, Australia.

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