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1 edition of Role of ethylene in lettuce (Lactuca sativa L.) germination at supraoptimal temperatures found in the catalog.

Role of ethylene in lettuce (Lactuca sativa L.) germination at supraoptimal temperatures

by Iwanka Kozarewa

  • 392 Want to read
  • 21 Currently reading

Published .
Written in English


Edition Notes

Statementby Iwanka Kozarewa
The Physical Object
Paginationviii, 272 leaves :
Number of Pages272
ID Numbers
Open LibraryOL25936454M
OCLC/WorldCa880637178

ethylene inhibitors. Lettuce seed has been used as a model to study the role of ethylene in seed germination at high temperature. The role of ethylene in germination is not known but either ethylene evolution or addition of 1-aminocyclopropanecarboxilic acid (ACC) have been associated with increased activity of endo-β-. Ethylene biosynthesis within the cell has been well characterized. To view a diagram of ethylene biosynthesis click here There is lots of interesting research involving the role of ethylene in plant growth and development going on even as we speak Click on .

Ethylene production Ethylene gas is a natural by-product of perishables during respiration. If managed properly, it can be used to control the ripening process. Produce vary in their sensitivity to ethylene levels and concentration, which together with the control of temperature,oxygen and carbon dioxide levels, play a vital role in the. This experiment lends support to the promoter role of ethylene in senescence. In addition, certain Arabidopsis mutant lines with ethylene signaling-defective genes (ein2), which renders the mutants insensitive to ethylene, showed delayed senescence (Buchanan-wollaston et al., ; Gan, ).Author: Imran Haider Shamsi, Tichaona Sagonda, Xin Zhang, Gerald Zvobgo, Heren Issaka Joan.

  A BLT is not a well-dressed bacon sandwich. A BLT is a tomato sandwich, seasoned with bacon. From this basic premise, all else follows. Indeed, a better name for the BLT might well be the Tomato Club, for it is the perfect tomato, not the bacon, that is the rarest, the most ephemeral, the most singularly delicious ingredient. A BLT is not a democracy. The inflorescence of the monoecious maize plant is unique among the Gramineae in the sharp separation of the male and female structures. The male tassel at the terminus of the plant most often sheds pollen before the visual appearance of the receptive silks of th the female ear at a lateral bud.


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Role of ethylene in lettuce (Lactuca sativa L.) germination at supraoptimal temperatures by Iwanka Kozarewa Download PDF EPUB FB2

An assessment of the role of ethylene in mediating lettuce (Lactuca sativa) root growth at high temperatures February Journal of Experimental Botany 58(11)   Promotion of thermoinhibited (30°C) lettuce (Lactuca sativa cv `Grand Rapids') seed germination by ethylene is similar to the action of the gas in other hormonal systems.

Ethylene was more active than propylene and ethane was inactive. An inhibitor of ethylene production, aminoethoxy-vinylglycine, reduced ethylene evolution and germination. Inhibitors of ethylene action such as, 5 Cited by:   Abstract. Growth of temperate lettuce (Lactuca sativa) plants aeroponically in tropical greenhouses under ambient root-zone temperatures (A-RZTs) exposes roots to temperatures of up to 40 °C during the middle of the day, and severely limits root and shoot role of ethylene in inhibiting growth was investigated with just-germinated (h-old) seedlings in vitro, and d-old Cited by:   Ethylene and CO2 were used to control induction of germination in thermodormant lettuce seed (Lactuca sativa L.).

These experiments ultimately showed that germination depends on the presence of an active form of the phytochrome. The phytochrome system is functional and stable at 35 C, a temperature which completely inhibits by: Lettuce (Lactuca sativa) is an annual plant of the daisy family, is most often grown as a leaf vegetable, but sometimes for its stem and e is most often used for salads, although it is also seen in other kinds of food, such as soups, sandwiches and wraps; it can also be grilled.

One variety, the woju (莴苣), or asparagus lettuce (celtuce), is grown for its stems Clade: Angiosperms. Often considered an 'aging' hormone due to its role in accelerating such developmental processes as ripening, senescence, and abscission, the plant hormone ethylene also regulates many aspects of growth and development throughout the life cycle of the plant.

Multiple mechanisms have been identified by which transcriptional output from the ethylene signaling pathway can be tailored to meet Cited by:   Role of Ethylene in Climacteric and Non-Climacteric Plants. Flowers can be categorized as being ethylene sensitive or ethylene insensitive.

In climacteric or ethylene sensitive flowers such as carnations and orchids, senescence is accompanied by a sudden transient increase in ethylene production and respiration, while treatment of non-senescent flowers with ethylene rapidly induces Cited by:   Fruits Ripening Gas - Ethylene The natural question is what is ethylene gas, how it is used and is it safe for humans.

Ethylene is a hydrocarbon gas (C 2 H 4, molecular weight ), flammable, odorless, harmless and tasteless [2].It is a type of plant hormone, known as senescence hormone released by fruits and vegetables.

The Role of Ethylene in Fruit Ripening. Most fruits produce a gaseous compound called ethylene that starts the ripening process. Its level in under-ripe fruit is very low, but as fruit develop, they produce larger amounts that speed up the ripening process or the stage of ripening known as the “climacteric.”.

Ethylene treatment ( μmolm-3) of lettuce at 6 °C had induced russet spotting >5% to 10% of the midrib tissue by day 3 and 30% to 35% by day 9, while pretreatment with MCP for 4 hours at 6.

Dunlap JR, Morgan PW. () Reversal of induced dormancy in lettuce by ethylene, kinetin, and gibberellic acid. Plant Physiol – [PMC free article] Dutta S, Bradford K. () Water relations of lettuce seed thermoinhibition. Ethylene and endosperm effects on base water potential.

Seed Sci Res 4: 11–18Cited by: 9. The role of ethylene in germination is not known but either ethylene evolution or addition of 1-aminocyclopropanecarboxilic acid (ACC) have been associated with increased activity of endo-b-mannanase, a cell-wall enzyme that weakens the endosperm and allows lettuce seed to germinate at high temperature.

This review describes some results on. Introduction. The plant hormone ethylene (ET) exerts effects in regulating fundamental processes of plant growth and development such as flowering, ripening of climacteric fruits, ageing, dehiscence, release of seed dormancy, and germination.Likewise, ET also participates in abiotic stress processes and mediates the effects of other hormones by regulating their biosynthesis Cited by:   The role of ethylene in the post harvestshelf life (One bad apple spoils the whole bushel)• The presence of ethylene is not always beneficial, especially in termsof postharvest shelf life (Optimal Fresh,).It seems that because itis a colour less gas that is not often measured in commercialsituations its presence is over looked.•.

Fu, J.R. and Yang, S.F. () Release of heat pretreatmentinduced dormancy in lettuce seeds by ethylene on cytokinin in relation to the production of ethylene and the synthesis of 1-aminocyclopropanecarboxylic acid during by: Postharvest Ethylene: A critical factor in quality management.

By Jenny Jobling Ethylene plays a role in the postharvest life of many horticultural crops. Ethylene is a colourless gas with a faint sweetish smell that is the naturally produced ripening hormone of some fruit.

It is also produced as an exhaust gas from petrol combustion Size: 29KB. Ethylene is a natural product of plant metabolism and is produced by all tissues of higher plants.

It is considered the natural aging and ripening hormone and is active even at small traces. Horticultural commodities can be classified as follows, based on the amount of File Size: 1MB.

Ethylene gas is a major plant hormone that influences diverse processes in plant growth, development and stress responses throughout the plant life cycle.

Responses to ethylene, such as fruit ripening, are significant to agriculture. The core molecular elements of the ethylene-signaling pathway have been uncovered, revealing a unique pathway that is negatively by: The postharvest life of shredded crisphead lettuce was extended by % when fumigated with the inhibitors of ethylene action, nitric oxide (NO) and 1-methylcyclopropene (MCP).

A more detailed study with MCP applied to crisphead lettuce stored in air at 5°C found a 50% increase in postharvest life following fumigation for 1 hr with uL/L MCP. leaf lettuce include Romaine, red and green leaf lettuce, and butterhead varieties like Boston or Bibb lettuce.

Nearly all commercially produced leaf lettuce in the United. States comes from California and Arizona (Fig 1). This equates to over 12 billion pounds of leaf lettuce each year. Leaf lettuce is grown in the coastal areas of Salinas. It's Probably Ethylene Gas Novem Author: Ann Clary Organic Gardening: Vegetables / The Mighty Garden Archive You locate the romaine lettuce for your dinner salad in the back right corner of your refrigerator, just behind the apples, but alas, you notice brown spots on .Recently, increasing evidence suggests that ethylene (ET) biosynthesis is important for rice blast resistance.

Based on the analysis of transgenic rice lines defective in ET, abscisic acid (ABA), or mitogen-activated protein (MAP) kinase pathways, we have demonstrated that ET and its antagonistic interaction with ABA plays a crucial role in Cited by:   The gaseous plant hormone ethylene not only plays an important role in various aspects of plant growth and development, including seed germination, organ senescence, and fruit development, it also regulates stress responses to environmental challenge (reviewed by Fluhr and Mattoo ).Notably, the effect of ethylene on climacteric fruit ripening and its signaling transduction Cited by: