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Le piante possono naturalmente controllare l'apertura e la chiusura degli stomi, i pori che assorbono anidride carbonica rilasciando contemporaneamente acqua. Il biossido di carbonio serve alla pianta, perchè attraverso di essa è in grado di portare avanti una serie reactions essential for the survival of plant cells, in doing so, however, enter the atmosphere in the form of steam, water, another essential element for plant survival, as indeed of any body. In drought conditions, a plant can close its stomata to prevent water leakage is too high in quantity, but in this way, the plant greatly reduces the amount of carbon dioxide that can take from the outside, everything can greatly reduce photosynthesis and growth.
Le piante possono naturalmente controllare l'apertura e la chiusura degli stomi, i pori che assorbono anidride carbonica rilasciando contemporaneamente acqua. Il biossido di carbonio serve alla pianta, perchè attraverso di essa è in grado di portare avanti una serie reactions essential for the survival of plant cells, in doing so, however, enter the atmosphere in the form of steam, water, another essential element for plant survival, as indeed of any body. In drought conditions, a plant can close its stomata to prevent water leakage is too high in quantity, but in this way, the plant greatly reduces the amount of carbon dioxide that can take from the outside, everything can greatly reduce photosynthesis and growth.
Mickelbart Mike, assistant professor of horticulture; Mike Hasegawa, professor of horticulture and Chal Yul Yoo, uno studente laureato orticoltura, hanno scoperto che una mutazione genetica in
Arabidopsis thaliana
Plant Researchtende in tali condizioni a ridurre il numero di stomi. Ma invece di limitare l'assunzione di anidride carbonica, il gene crea un equilibrio benefico. Arabidopsis thaliana
Mickelbart e Yoo hanno utilizzato un analizzatore di gas a infrarossi per determinare la quantità di anidride carbonica e acqua presi in persi nel mutante di Arabidopsis. L'anidride carbonica è stata pompata in una camera al cui interno vi è la pianta; l'analizzatore misura la quantità di gas che la pianta assorbe ha iniziato ad assorbire il gas. 
L'analisi ha dimostrato che the plant, which has a mutant form of the gene
GTL1 L'analisi ha dimostrato che the plant, which has a mutant form of the gene "The decrease in transpiration leads to increased drought tolerance in plants mutant ," said Yoo. " In this way the plants are able to release less water
" genes that are known to be involved in the control of the stomata are about 20, including
SDD1
was highly expressed in the mutant. SDD1 is a gene that is responsible for Adjusting the number of stomata on the leaves. In the mutant, with GTL1 not working, SDD1 is highly expressed, resulting in the development of a smaller number of stomata. Mickelbart said the discovery is important because it opens the possibility that there is a natural way to improve the drought tolerance of crops without reducing biomass or product.
sources: http://www.purdue.edu/newsroom/research/2011/110111MickelbartGene.html
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