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Details van artikel 25 van 132 gevonden artikelen
| Titel: |
Comparative Leaf Anatomy and Pressure-Volume Analysis in Plants of Ipomoea pes-caprae Experimenting Saline and/or Drought Stress |
| Auteur: |
N. Suarez |
| Verschenen in: |
International journal of botany |
| Paginering: | Jaargang 7 (2011) nr. 1 pagina's 53-62 |
| Jaar: |
2011 |
| Inhoud: |
Ipomoea pes-caprae is a vine common in tropical and subtropical coasts. This species appears to be more susceptible to drought as compared with saline stress and when both stresses are combined, the water and carbon balance may be enhanced compared with the two stresses applied independently. In this study, leaf anatomy and parameters obtained by P-V analysis were measured in I. pes-caprae experimenting saline and/or water stress. NaCl and PEG were used to induce iso-osmotic pressures in the soil solution (Ψsol) to -5 and -10 bar and both osmotica were combined to apply simultaneous saline and water stress (S+W) for a total reduction in Ψsol of -5 bar. Saline and/or water stress increased the lamina thickness and cell size but the effect was higher under high saline stress. Osmotic potential at full (Ψπ100) and at zero (Ψπ0) turgor were significantly lower at high salinity and S+W stress, compared with the other treatments. Osmotic adjustment resulting from net solute accumulation explains 85-98% of the total change in Ψπ. The contribution of dehydration to changes in Ψπ was apparent only under high water stress. Single stress had no significant effect on the modulus of elasticity (ε) and apoplastic water fraction. However, plants growing under S+W showed the lowest values of ε. Changes in Ψπ and ε affected the relative ability of plants subjected to S+W treatment to maintain high turgor pressure at lower relative water content and confirm that the ability of I. pes-caprae to grow under lower Ψsol may be increased if experiments both stresses simultaneously. |
| Uitgever: |
Asian Network for Scientific Information (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 25 van 132 gevonden artikelen
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