| |
| Web URL(s): | https://academic.oup.com/aob/article/66/5/521/147488/
Last checked: 02/27/2017
Requires: PDF Reader |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Thomas, Henry |
|---|
| Author Affiliation: | AFRC Institute for Grassland and Environmental Research, Welsh Plant Breeding Station, UK |
|---|
| Title: | Osmotic adjustment in Lolium perenne; Its heritability and the nature of solute accumulation |
|---|
| Source: | Annals of Botany. Vol. 66, No. 5, November 1990, p. 521-530. |
|---|
| Publishing Information: | London, Oxford University Press |
|---|
| Keywords: | TIC Keywords: Osmotic potential; Osmotic pressure; Lolium perenne; Paternal effects; Genetic constancy
|
|---|
| Abstract/Contents: | "Plants derived from Lolium perenne L. cv. 'Melle' were selected on the basis of extreme high or low lamina solute potential and pair-crossed to produce divergent G2 lines. The high and low lines had mean lamina solute potential values significantly different from each other and from 'Melle', and showed an enhanced range of phenotypic expression of solute potential during drought. Both mature lamina solute potential and meristem solute potential values of droughted plants were highly heritable. Extreme G2 genotypes were selected and clonally replicated for futher study. During drought mean solute potential values fell from -1.21 to -1.80 MPa. Fructans of large molecular weight, and total free amino acids, especially proline, all accumulated when estimated on a dry-matter (DM) or plant-water (PW) basis. Oligosaccharide content was largely unchanged. Minerals declined when estimated on a DM basis but accumulated on a PW basis because hydration (g water in turgid tissue per g DM) declined more rapidly. In comparison with genotypes having high constitutive solute potentials, low-solute potential genotypes (a) were larger, had faster leaf extension rate, had fewer tillers, and were proportionally more affected by drought, (b) showed greater osmotic adjustment, (c) contained and accumulated much more fructan (but not oligosaccharides), and amino acids, especially proline, and (d) accumulated more mineral ions on a PW basis, but less on a DM basis. The relatively high repeatabilities for organic solutes in particular show that further divergent selection for individual solutes would not be difficult. Solutes accumulated, probably because they were not consumed in growth. There was no evidence of 'competition' between growth and osmotic adjustment for metabolites, or that plants which accumulated more solutes were better able to recover when water deficits were relieved." |
|---|
| Language: | English |
|---|
| References: | 29 |
|---|
| Note: | Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Thomas, H. 1990. Osmotic adjustment in Lolium perenne; Its heritability and the nature of solute accumulation. Ann. Bot. 66(5):p. 521-530. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=19457 |
| If there are problems with this record, send us feedback about record 19457. |
| Choices for finding the above item: |
|---|
| Web URL(s):
https://academic.oup.com/aob/article/66/5/521/147488/
Last checked: 02/27/2017
Requires: PDF Reader |
| 
MSU catalog number: QK 1 .A53 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
