SkierGuy23

I got exactly 50%. 2 of 4 dynamite seeds. I can't say that it didn't work for me because I don't know what they would have done without the bananas but I don't think I'll be using them anymore.

Thanks for bringing this to GC.com!!!!

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tripps

Exactly, that's the problem, unless you ran 100 each from the same seeds, with and without, it's impossible to say if they do anything or not.

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katchafire

well i just read the entire banatogolist's bible ... wow did i miss the wagon or what.

i have 3 ak's and 3 lui's that in their 5th week since germ. still no signs of preflowers but i would have slept a little more comfortably if they had mingled with some of those bananas. i am in dire need of females from these seeds for some bonzai moms. next time i start from seed i will pick some bananas from my organic outdoor garden and introduce them to their climate controlled neighbors. i figure using store bought bananas will put my omri certification at risk

thanks to everyone who contributed to this thread, esp. blue for starting it. it was a great read that proves that there are many methods and routes to growing our favorite plant. if anything i hope that it will help other growers expand their minds and their growrooms .... and stop spending money on over-hyped over-marketed nutrients and additives.

one love.

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ColSmoke

From the WEEKEE. I researched Ethylene a bit and found this.

Ethylene perception in plants


Ethylene could be perceived by a transmembrane protein dimer complex. The first gene encoding an ethylene receptor was first cloned from Arabidopsis thaliana by Caren Chang, Elliot Meyerowitz and colleagues at the California Institute of Technology[16] and then in tomato by Jack Wilkinson, Harry Klee and colleagues at the Monsanto Company[17]. Ethylene receptors are encoded by multiple genes in the Arabidopsis and tomato genomes. The gene family is comprised of five receptors in Arabidopsis and six in tomato, most of which have been shown to bind ethylene. DNA sequences for ethylene receptors have also been identified in many other plant species and an ethylene binding protein has even been identified in Cyanobacteria[18]

Environmental and biological triggers of ethylene


Environmental cues can induce the biosynthesis of the plant hormone. Flooding, drought, chilling, wounding, and pathogen attack can induce ethylene formation in the plant.

In flooding, root suffers from lack of oxygen, or anoxia, which leads to the synthesis of 1-Aminocyclopropane-1-carboxylic acid (ACC). ACC is transported upwards in the plant and then oxidized in leaves. The product, the ethylene causes epinasty of the leaves.

One speculation recently put forth for epinasty is the downard pointing leaves may act as pump handles in the wind. The ethylene may or may not additionally induce the growth of a valve in the xylem, but the idea would be that the plant would harness the power of the wind to pump out more water from the roots of the plants than would normally happen with transpiration.

Physiological responses of plants

Like the other plant hormones, ethylene is considered to have pleiotropic effects. This essentially means that it is thought that at least some of the effects of the hormone are unrelated. What is actually caused by the gas may depend on the tissue affected as well as environmental conditions. In the evolution of plants, ethylene would simply be a message that was coopted for unrelated uses by plants during different periods of the evolutionary development.


List of Plant Responses to Ethylene

* Seedling triple response, thickening and shortening of hypocotyl with pronounced apical hook. This is thought to be a seedling's reaction to an obstacle in the soil such a stone, allowing it to push past the obstruction.
* In pollination, when the pollen reaches the stigma, the precursor of the ethylene, ACC, is secreted to the petal, the ACC releases ethylene with ACC oxidase.
* Stimulates leaf and flower senescence
* Stimulates senescence of mature xylem cells in preparation for plant use
* Inhibits shoot growth except in some habitually flooded plants like rice
* Induces leaf abscission
* Induces seed germination
* Induces root hair growth – increasing the efficiency of water and mineral absorption
* Induces the growth of adventitious roots during flooding
* Stimulates epinasty – leaf petiole grows out, leaf hangs down and curls into itself
* Stimulates fruit ripening
* Induces a climacteric rise in respiration in some fruit which causes a release of additional ethylene. This can be the one bad apple in a barrel spoiling the rest phenomenon.
* Affects neighboring individuals
* Disease/wounding resistance
* Triple response when applied to seedlings – stem elongation slows, the stem thickens, and curvature causes the stem to start growing horizontally. This strategy is thought to allow a seedling grow around an obstacle
* Inhibits stem growth outside of seedling stage
* Stimulates stem and cell broadening and lateral branch growth also outside of seedling stage
* Synthesis is stimulated by auxin and maybe cytokinin as well
* Ethylene levels are decreased by light
* The flooding of roots stimulates the production of ACC which travels through the xylem to the stem and leaves where it is converted to the gas
* Interference with auxin transport (with high auxin concentrations)
* Inhibits stomatal closing except in some water plants or habitually flooded ones such as some rice varieties, where the opposite occurs (conserving CO2 and O2)
* Where ethylene induces stomatal closing, it also induces stem elongation
* Induces flowering in pineapples

Ethylene shortens the shelf life of many fruits by hastening fruit ripening and floral senescence. Tomatoes, bananas, and apples will ripen faster in the presence of ethylene. Bananas placed next to other fruits will produce enough ethylene to cause accelerated fruit ripening. Ethylene will shorten the shelf life of cut flowers and potted plants by accelerating floral senescence and floral abscission. Flowers and plants which are subjected to stress during shipping, handling, or storage produce ethylene causing a significant reduction in floral display. Flowers affected by ethylene include carnation, geranium, petunia, rose, and many others[19].

Ethylene can cause significant economic losses for florists, markets, suppliers, and growers. Researchers have come up with several ways to inhibit ethylene, including inhibiting ethylene synthesis and inhibiting ethylene perception. Inhibiting ethylene synthesis is less effective for reducing post-harvest losses since ethylene from other sources can still have an effect. By inhibiting ethylene perception, fruits, plants and flowers don't respond to ethylene produced endogenously or from exogenous sources. Inhibitors of ethylene perception include compounds that have a similar shape to ethylene, but do not elicit the ethylene response. An example of an ethylene perception inhibitor is 1-methylcyclopropene (1-MCP).

Commercial growers of bromeliads, including pineapple plants, use ethylene to induce flowering. Plants can be induced to flower either be treated with the gas in a chamber or by placing a banana peel next to the plant in an enclosed area.

This religious is really starting to border science, much like Scientology

matrim

Got 2/2 females now.
Different strains, different grows.

I don't care if it is the banana or just good karma , I'm going to keep doing it anyway

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dude101

Ok This is the biggest breakthrough since UVB!

I have to go back and read every page when im not late for work!

BUT I just gotta say, *knock* on wood, if LEO were to ever bust me Id aboslutely convince them that Im growing banana tree's.


-dude

Octopus

My results: 8 females out of 12. Now remember I didnt get the nanas under them until day 26 and kept replacing them untill all were sexed. Maybe if I'd gotten them under there earlier I'd have an even better ratio. I'm gonna go ahead and attribute the 8th fem and maybe even the 7th to the bananas, but even if they had nothing to do with it, I only spent around 6 bucks on bananas all together.

The messed up thing about this being a "religion" is my ratio is 66.666..
so maybe bananas are the devils work? (I know it's actually rounded to 66.7 but kinda eerie none the less )


ps thanks to Bluecheese for getting this going, I love learning while I grow!

eyes88

That's cool Octopus!

For fun, I ran a quick Chi Square analysis on those numbers: 8 Females and 4 Males... Assuming that there is a 50/50 chance of getting males and females (i don't know if this is true or not, but let's assume that it is), then the probability of getting 8 females and 4 males out of 12 plants is p = 0.248. In other words, the chance of getting this ratio randomly is 1 in 4.

peace,
- eyes88

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Oh So Grow So

Terri Gross had a guest on Fresh Air (NPR show) to talk about about naners going extinct. There was a virus that almost killed them off a while back, until farmers came up with a new strain of naner that is resistant to the virus. well the same virus is back and the better strain of naner is no longer resistant to it. they talked about Ethylene gas too. heheh.

damnit! save the naners!

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bobbooty

there are basically 2 schools of thought on this:

one camp believes that sex of MJ plant is determined within first 2-4 weeks of growth, after seed germination, and that a plant is non sex before that. this camp also believes that environmental factors play a role in producing male or females. i think breeder sensi seeds even promoted this idea at a time, they may still?

one camp believes that sex is always 50/50, right at the seed. environmental factors do not apply to this thought as far as i understand.

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