Abstract
Cotton (Gossypium hirsutum L.) plants were grown in sand culture on nutrient solution containing adequate or growth-limiting levels of P. When water was withheld from the pots, stomata of the most recently expanded leaf closed at leaf water potentials of approximately −16 and −12 bars in the normal and P-deficient plants, respectively. Pressure-volume curves showed that the stomata of P-deficient plants closed when there was still significant turgor in the leaf mesophyll. Leaves of P-deficient plants accumulated more abscisic acid (ABA) in response to water stress, but the difference was evident only at low water potentials, after initiation of stomatal closure. In leaves excised from unstressed plants, P deficiency greatly increased stomatal response to ABA applied through the transpiration stream. Kinetin blocked most of this increase in apparent sensitivity to ABA. The effect of P nutrition on stomatal behavior may be related to alterations of the balance between ABA and cytokinins.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Ackerson R. C. Stomatal response of cotton to water stress and abscisic Acid as affected by water stress history. Plant Physiol. 1980 Mar;65(3):455–459. doi: 10.1104/pp.65.3.455. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Aharoni N., Blumenfeld A., Richmond A. E. Hormonal activity in detached lettuce leaves as affected by leaf water content. Plant Physiol. 1977 Jun;59(6):1169–1173. doi: 10.1104/pp.59.6.1169. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Bradford K. J. Involvement of plant growth substances in the alteration of leaf gas exchange of flooded tomato plants. Plant Physiol. 1983 Oct;73(2):480–483. doi: 10.1104/pp.73.2.480. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Dhillon S. S. Influence of Varied Phosphorus Supply on Growth and Xylem Sap Cytokinin Level of Sycamore (Platanus occidentalis L.) Seedlings. Plant Physiol. 1978 Apr;61(4):521–524. doi: 10.1104/pp.61.4.521. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Guinn G. Fruit age and changes in abscisic Acid content, ethylene production, and abscission rate of cotton fruits. Plant Physiol. 1982 Feb;69(2):349–352. doi: 10.1104/pp.69.2.349. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Itai C., Vaadia Y. Cytokinin Activity in Water-stressed Shoots. Plant Physiol. 1971 Jan;47(1):87–90. doi: 10.1104/pp.47.1.87. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Lurie S. Differential Ion Stimulation of Plasmalemma Adenosine Triphosphatase from Leaf Epidermis and Mesophyll of Nicotiana rustica L. Plant Physiol. 1979 May;63(5):936–939. doi: 10.1104/pp.63.5.936. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Mizrahi Y., Blumenfeld A., Richmond A. E. Abscisic Acid and transpiration in leaves in relation to osmotic root stress. Plant Physiol. 1970 Jul;46(1):169–171. doi: 10.1104/pp.46.1.169. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Radin J. W., Eidenbock M. P. Hydraulic conductance as a factor limiting leaf expansion of phosphorus-deficient cotton plants. Plant Physiol. 1984 Jun;75(2):372–377. doi: 10.1104/pp.75.2.372. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Radin J. W., Parker L. L., Guinn G. Water Relations of Cotton Plants under Nitrogen Deficiency: V. Environmental Control of Abscisic Acid Accumulation and Stomatal Sensitivity to Abscisic Acid. Plant Physiol. 1982 Oct;70(4):1066–1070. doi: 10.1104/pp.70.4.1066. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Radin J. W. Water Relations of Cotton Plants under Nitrogen Deficiency: III. STOMATAL CONDUCTANCE, PHOTOSYNTHESIS, AND ABSCISIC ACID ACCUMULATION DURING DROUGHT. Plant Physiol. 1981 Jan;67(1):115–119. doi: 10.1104/pp.67.1.115. [DOI] [PMC free article] [PubMed] [Google Scholar]