The Influence of Fruit on the Regulation of Internal Ethylene Concentrations and Sex Expression in Cucurbita texana

  title={The Influence of Fruit on the Regulation of Internal Ethylene Concentrations and Sex Expression in Cucurbita texana},
  author={Gary A. Krupnick and Kathleen M. Brown and Andrew G. Stephenson},
  journal={International Journal of Plant Sciences},
  pages={321 - 330}
Plants with labile sex expression often regulate the production of pistillate and staminate flowers on the basis of developmental and environmental conditions. In many monoecious plant species, developing fruits inhibit pistillate flower production and promote staminate flower production. Because the phytohormone ethylene promotes pistillate flower production in a variety of wild and cultivated plant species, we examined the influence of fruit development on internal ethylene production and… 

Effects of herbivory on internal ethylene production and sex expression in Cucurbita texana.

Damaged plants produced fewer pistillate buds than undamaged plants, indicating that stress ethylene from simulated herbivory does not induce femaleness, and a second messenger that suppresses Pistillate bud production may be produced during damage.

Effect of modified endogenous ethylene production on sex expression, bisexual flower development and fruit production in melon (Cucumis melo L.)

Results provide a direct demonstration of the importance of endogenous ethylene production for female reproductive processes in melon.

Involvement of Ethylene Biosynthesis and Signalling in the Transition from Male to Female Flowering in the Monoecious Cucurbita pepo

The expression of the ethylene receptor and CTR-like genes in the apex of Veg and Bog plants indicates that these genes negatively regulate female flower transition during the earlier stages of plant development.

Growth and Resource Allocation in Cucurbita pepo ssp. texana: Effects of Fruit Removal

Recent theory indicates that plants may be able to increase their fitness by adjusting the relative investment of resources in growth and reproduction, through the male or female function, in

Effect of CRC::etr1-1 transgene expression on ethylene production, sex expression, fruit set and fruit ripening in transgenic melon (Cucumis melo L.)

Insight is provided into the role of ethylene perception in carpel-bearing flower production, fruit set, fruit development, and ripening in cucurbits.

Effects of the Spatial Pattern of Leaf Damage on Growth and Reproduction: Whole Plants

Very few traits were affected by foliar damage, regardless of the spatial pattern of distribution, suggesting that these plants have a high tolerance to simulated herbivory.

Pollinators and Reproductive Success of the Wild Cucurbit Cucurbita maxima ssp. andreana (Cucurbitaceae)

This wild cucurbit is a generalist with respect to pollinator guild, and flower visitors seem to be highly efficient in pollen transference, and it is well adapted to disturbed habitats because plants ripened fruits successfully, regardless of the group of insects visiting flowers.

New Insights into Reproductive Development in Melon (Cucumis melo L.)

This review examines melon flower development with an emphasis on sex expression and development of carpelbearing flowers and discusses fruit development and ripening processes, including factors that contribute to production of high quality fruits such as sweetness, flavor, texture, and aroma.

Hormonal interactions and gene regulation can link monoecy and environmental plasticity to the evolution of dioecy in plants.

This review explores the roles of environmental stress and hormones on sex determination, and proposes a model that can explain the evolution of dioecy through monoecy, and the mechanisms of environmental sex determination.

On the Impact of Zucchini Yellow and Watermelon Mosaic Viruses on the Production Rhythms of Transgenic ZW-20 and Nontransgenic Squash (Cucurbita pepo L.)

The outcomes of this study sustain the hypothesis that ZYMV and WMV have no impact on the production rhythms of virus-resistant transgenic ZW-20 squash, but they do alter those of nontransgenic cv Pavo.



Environmental and Physiological Effects on Pistillate Flower Production in Silene noctiflora L. (Caryophyllaceae)

Results of this study show that plasticity in pistillate flower production in S. noctiflora is influenced by changes in temperature and ethylene, which may represent an adaptive mechanism to increase outcrossing when conditions are more favorable for pollinator activity.

Sex Expression and the Production of Ethylene induced by Auxin in the Cucumber (Cucumis sativum L.)

Evidence is found that cucumber plants treated with auxins or CEPA also produce ethylene, which, it is suggested, alters the sex expression of the treated plants.

Leaf Carbohydrate Status and Enzymes of Translocate Synthesis in Fruiting and Vegetative Plants of Cucumis sativus L.

The lower galactinol pools may be associated with an activation of the terminal step in stachyose biosynthesis in leaves in response to the high sink demand of a growing cucumber fruit.

Architecture and Gender Allocation: Floral Sex Expression Along Branches of the Monoecious cucurbit, Apodanthera undulata

  • V. Delesalle
  • Biology
    International Journal of Plant Sciences
  • 1992
Data indicate that male plants probably experience less favorable growing conditions than monoecious plants, and the distributions of staminate and pistillate buds along branches and the length of their associated internodes indicate that floral bud production is affected by the same factors that determine branch growth.


Ethylene supplied to the roots is shown to promote adventitious rooting and downward rolling of the young leaf laminae and to modify the orientation of shoot growth in the tomato mutant‘diageotropica’.

Ethylene evolution from cucumber plants as related to sex expression.

The data suggest that ethylene participates in the endogenous regulation of sex expression by promoting femaleness.

The Role of Ethylene in Interorgan Signaling during Flower Senescence

Investigation of orchid (Cymbidium) flowers found ethylene produced in the stigmatic region following pollination or emasculation serves as a mobile factor responsible for senescence symptoms observed in other flower parts, but the results do not confirm the presumed role of ACC as a signal in interorgan communication during flowersenescence.

Diffusible IAA and dominance phenomena in fruits of apple and tomato

It is suggested that diffusible IAA is involved in the correlative signal regulating dominance relationship between fruits, and between fruits and shoots in apple and tomato.

Fruit and seed production : aspects of development, environmental physiology and ecology

The author examines the regulation of maternal investment in plants and the evolution and ecology of endozoochory in the European flora in the context of a cool climate.

Tests of a mechanistic model of one hormone regulating both sexes in Cucumis sativus (Cucurbitaceae)

Results indicated that there is only one hormone, not two, regulating sex expression in cucumber, and that the sex hormone is likely to be ethylene, and all assumptions and predictions of the one-hormone model were confirmed.