Dictionary » D » Drought



1. Dryness; want of rain or of water; especially, such dryness of the weather as affects the earth, and prevents the growth of plants; aridity. The drought of march hath pierced to the root. (Chaucer) In a drought the thirsty creatures cry. (Dryden)

2. Thirst; want of drink.

3. Scarcity; lack. A drought of Christian writers caused a dearth of all history. (Fuller)

Origin: oe. Droght, drougth, dru, as. Druga, from drugian to dry. See dry, and cf. Drouth, which shows the original final sound.

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Re: Transpiration Please help Me

... dioxide and oxygen levels within the plant allows for the "inadvertant" escape of water through diffusion. Under stressful conditions, drought, the plant will close stomata as an attempt to regulate water loss. But eventually, the plant has to open the stomata to regulate carbon dioxide/oxygen ...

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by daddyjames
Sun Oct 14, 2012 2:34 pm
Forum: Botany Discussion
Topic: Transpiration Please help Me
Replies: 29
Views: 28225


... this is actually known as the bottleneck effect, according to the 6th edition Campbell Reece biology textbook. - "disasters such as... droughts" (or rather the resulting famine caused by a drought or similar occurrence such as overconsumption of a food source) "may reduce ...

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by cyanodave
Thu Mar 29, 2012 11:34 pm
Forum: Ecology
Topic: Herbivores without predators
Replies: 19
Views: 16112

Re: What are the limits of genetic engineering

... by means of pyrosequencing and other techniques, and one of the goals is to find genes that code for valuable properties (resistance to radiation, drought, salinity, cold, new antibiotics, enzymes). So that's why I was wondering what the possibilities are once interesting things are found in the ...

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by Lucanus cervus
Thu Dec 15, 2011 9:01 pm
Forum: Genetics
Topic: What are the limits of genetic engineering
Replies: 9
Views: 5947

Re: Evolution or De-evolution?

... how this 2 estrus cycles per year instead of one...could occur. Suppose there are a bunch of kinds of organisms in an environment where a drought is occurring. Suppose the genes that do something in kidney cells do something different in reproductive organ cells ( e.g. wrt to estrus ) ...

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by Crucible
Sat Oct 22, 2011 1:32 pm
Forum: Evolution
Topic: Evolution or De-evolution?
Replies: 52
Views: 43966

"Living" plants?

You can use the "drought" method. This technique enables the rapid assessment and comparison of the relative viability of germplasm during drought, and may complement detailed physiological and water relations studies.

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by Anonymous
Fri Jul 30, 2010 8:35 am
Forum: General Discussion
Topic: "Living" plants?
Replies: 2
Views: 1114
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