Details
| Original language | English |
|---|---|
| Pages (from-to) | 15-27 |
| Number of pages | 13 |
| Journal | Scientia horticulturae |
| Volume | 102 |
| Issue number | 1 |
| Early online date | 19 Feb 2004 |
| Publication status | Published - 15 Oct 2004 |
Abstract
Vegetable amaranth (Amaranthus spp.) is a promising C4 crop for semi-arid regions due to its high nutritive value and an ability to adapt to drought stress. A pot experiment in a temperature-controlled greenhouse was conducted to investigate the effects of drought stress on biomass production, partitioning, and water use efficiency (WUE) of four genotypes of vegetable amaranth, viz. 'Hin Choi' (A. tricolor), 'Co.2' (A. tricolor), 'WS80-192' (A. blitum), and 'RRC 1027' (A. cruentus). Drought stress significantly decreased plant total dry mass, but the proportion of changes differed among root, stem, and leaf. Under drought, root dry mass ratio was increased in Co.2, WS80-192, and RRC 1027, whereas leaf dry mass ratio was decreased in Hin Choi, Co.2, and RRC 1027. Leaf area per root dry mass was decreased by drought stress in all genotypes examined. These results indicate that drought induced a more conservative balance between water-losing and water-obtaining organs. Specific leaf area (SLA) was decreased by drought stress and differed between genotypes. WUE of the four genotypes of vegetable amaranth was unaffected by drought stress, and ranged from 2.9 to 3.8 g DM kg-1 H2O, being the highest in RRC 1027 and the lowest in WS80-192. A negative relationship between SLA and WUE was observed over the four genotypes of vegetable amaranth under well-watered conditions.
Keywords
- Amaranthus spp., Biomass partitioning, Drought stress, Specific leaf area, Water use efficiency
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Horticulture
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In: Scientia horticulturae, Vol. 102, No. 1, 15.10.2004, p. 15-27.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Biomass partitioning, specific leaf area, and water use efficiency of vegetable amaranth (Amaranthus spp.) in response to drought stress
AU - Liu, F.
AU - Stützel, H.
N1 - Funding Information: We are grateful to the Lower Saxonian Ministry for Science and Culture for the financial support and to the USDA/ARS, North Central Regional Plant Introduction Station, Ames, IA, USA for supply of seed materials. F. Liu thanks the German Academic Exchange Service (DAAD) for the financial support during the experiment.
PY - 2004/10/15
Y1 - 2004/10/15
N2 - Vegetable amaranth (Amaranthus spp.) is a promising C4 crop for semi-arid regions due to its high nutritive value and an ability to adapt to drought stress. A pot experiment in a temperature-controlled greenhouse was conducted to investigate the effects of drought stress on biomass production, partitioning, and water use efficiency (WUE) of four genotypes of vegetable amaranth, viz. 'Hin Choi' (A. tricolor), 'Co.2' (A. tricolor), 'WS80-192' (A. blitum), and 'RRC 1027' (A. cruentus). Drought stress significantly decreased plant total dry mass, but the proportion of changes differed among root, stem, and leaf. Under drought, root dry mass ratio was increased in Co.2, WS80-192, and RRC 1027, whereas leaf dry mass ratio was decreased in Hin Choi, Co.2, and RRC 1027. Leaf area per root dry mass was decreased by drought stress in all genotypes examined. These results indicate that drought induced a more conservative balance between water-losing and water-obtaining organs. Specific leaf area (SLA) was decreased by drought stress and differed between genotypes. WUE of the four genotypes of vegetable amaranth was unaffected by drought stress, and ranged from 2.9 to 3.8 g DM kg-1 H2O, being the highest in RRC 1027 and the lowest in WS80-192. A negative relationship between SLA and WUE was observed over the four genotypes of vegetable amaranth under well-watered conditions.
AB - Vegetable amaranth (Amaranthus spp.) is a promising C4 crop for semi-arid regions due to its high nutritive value and an ability to adapt to drought stress. A pot experiment in a temperature-controlled greenhouse was conducted to investigate the effects of drought stress on biomass production, partitioning, and water use efficiency (WUE) of four genotypes of vegetable amaranth, viz. 'Hin Choi' (A. tricolor), 'Co.2' (A. tricolor), 'WS80-192' (A. blitum), and 'RRC 1027' (A. cruentus). Drought stress significantly decreased plant total dry mass, but the proportion of changes differed among root, stem, and leaf. Under drought, root dry mass ratio was increased in Co.2, WS80-192, and RRC 1027, whereas leaf dry mass ratio was decreased in Hin Choi, Co.2, and RRC 1027. Leaf area per root dry mass was decreased by drought stress in all genotypes examined. These results indicate that drought induced a more conservative balance between water-losing and water-obtaining organs. Specific leaf area (SLA) was decreased by drought stress and differed between genotypes. WUE of the four genotypes of vegetable amaranth was unaffected by drought stress, and ranged from 2.9 to 3.8 g DM kg-1 H2O, being the highest in RRC 1027 and the lowest in WS80-192. A negative relationship between SLA and WUE was observed over the four genotypes of vegetable amaranth under well-watered conditions.
KW - Amaranthus spp.
KW - Biomass partitioning
KW - Drought stress
KW - Specific leaf area
KW - Water use efficiency
UR - http://www.scopus.com/inward/record.url?scp=4444324049&partnerID=8YFLogxK
U2 - 10.1016/j.scienta.2003.11.014
DO - 10.1016/j.scienta.2003.11.014
M3 - Article
AN - SCOPUS:4444324049
VL - 102
SP - 15
EP - 27
JO - Scientia horticulturae
JF - Scientia horticulturae
SN - 0304-4238
IS - 1
ER -