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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
10/01/2010 |
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Data da última atualização: |
09/09/2013 |
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Autoria: |
KIRKHAM, M. B. |
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Título: |
Effect of ABA on the water relations of winter wheat cultivars varying in drought resistance. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
Physiologia Plantarum, Copenhagen, v. 59, n. 1, p. 153-157, 1983. |
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Idioma: |
Inglês |
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Conteúdo: |
Water and osmotic potentials were measured in leaves of a drought-sensitive (‘Ponca’) and a drought-resistant (‘KanKing’) cultivar of winter wheat (Triticum aestivum L. em. Thell.) to determine if the potentials of the drought-sensitive cultivar could be made similar to those of the drought-resistant cultivar through application of abscisic acid (ABA). Stomatal resistance was also measured. Plants were sprayed with ABA and grown in soil, which was watered or allowed to dry. In well-watered plants, ABA closed the stomata of both cultivars. Stomatal resistance of plants grown without added water and with ABA was less than that of plants grown without added water and without ABA. Under ample water supply, ABA decreased water and osmotic potentials of the drought-sensitive cultivar (Ponca), but had no effect on these potentials in the drought-resistant cultivar (KanKing). Under water-deprived conditions, ABA increased water and osmotic potentials of Ponca, but did not change these potentials in KanKing. The overall effect of ABA was to decrease the differences in the water and osmotic potentials between the two cultivars. |
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Thesagro: |
Seca; Trigo; Triticum Aestivum. |
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Thesaurus Nal: |
abscisic acid. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01633naa a2200169 a 4500
001 1835648
005 2013-09-09
008 1983 bl --- 0-- u #d
100 1 $aKIRKHAM, M. B.
245 $aEffect of ABA on the water relations of winter wheat cultivars varying in drought resistance.
260 $c1983
520 $aWater and osmotic potentials were measured in leaves of a drought-sensitive (‘Ponca’) and a drought-resistant (‘KanKing’) cultivar of winter wheat (Triticum aestivum L. em. Thell.) to determine if the potentials of the drought-sensitive cultivar could be made similar to those of the drought-resistant cultivar through application of abscisic acid (ABA). Stomatal resistance was also measured. Plants were sprayed with ABA and grown in soil, which was watered or allowed to dry. In well-watered plants, ABA closed the stomata of both cultivars. Stomatal resistance of plants grown without added water and with ABA was less than that of plants grown without added water and without ABA. Under ample water supply, ABA decreased water and osmotic potentials of the drought-sensitive cultivar (Ponca), but had no effect on these potentials in the drought-resistant cultivar (KanKing). Under water-deprived conditions, ABA increased water and osmotic potentials of Ponca, but did not change these potentials in KanKing. The overall effect of ABA was to decrease the differences in the water and osmotic potentials between the two cultivars.
650 $aabscisic acid
650 $aSeca
650 $aTrigo
650 $aTriticum Aestivum
773 $tPhysiologia Plantarum, Copenhagen$gv. 59, n. 1, p. 153-157, 1983.
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Embrapa Trigo (CNPT) |
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