Relationship of excised-leaf water loss and stomatal frequency in wheat

1993 ◽  
Vol 73 (1) ◽  
pp. 93-99 ◽  
Author(s):  
H. Wang ◽  
J. M. Clarke
Keyword(s):  
Triticum Aestivum ◽  
Water Content ◽  
Water Loss ◽  
Triticum Aestivum L ◽  
Leaf Water ◽  
Genotypic Differences ◽  
Stomatal Frequency ◽  
Stomatal Characteristics ◽  
Growth Room ◽  
Leaf Water Loss

Rate of water loss from excised leaves of wheat (Triticum spp.) is associated with adaptation to dry growing conditions, but the causes of observed genotypic differences are not well understood. This study was conducted to determine the relationship between stomatal characteristics and excised-leaf water status in tetraploid (Triticum turgidum L. var. durum) and hexaploid (Triticum aestivum L.) wheat genotypes. Samples were taken from field and growth-room experiments to measure stomatal frequency (SF) and size, leaf water content at excision (WC0) and 30 min after excision (WC30), rate of water loss (RWL) 30-120 min after excision, epidermal conductance (ge), and relative water content (RWC). SF was not correlated with RWL in the field experiments and was negatively correlated with WC0 and WC30 in tetraploids but not in hexaploids. In the growth-room experiment, SF was positively correlated with ge 50 and 30 min after excision for tetraploid and hexaploid genotypes, respectively. SF was correlated with RWL in tetraploids (r = 0.64*, n = 12) and hexaploids (r = 0.81**, n = 12). However, there were no significant correlations between stomatal characteristics and WC0, WC30 or RWC. These results indicate that SF is perhaps one of several factors influencing genotypic differences in excised-leaf water loss. The inconsistency of this relationship may be due to the influence of other traits affecting RWL. Key words: Leaf water loss, stomata, drought, Triticum aestivum L., T. turgidum L. var. durum

EFFECT OF LEAF ROLLING ON LEAF WATER LOSS IN Triticum spp.

1986 ◽  
Vol 66 (4) ◽  
pp. 885-891 ◽  
Author(s):  
JOHN M. CLARKE
Keyword(s):  
Triticum Aestivum ◽  
Water Loss ◽  
Genotypic Variation ◽  
Triticum Aestivum L ◽  
Leaf Water ◽  
Leaf Rolling ◽  
Triticum Spp ◽  
Leaf Surface Area ◽  
Leaf Water Loss ◽  
Field Plots

The effect of leaf rolling on water loss by wheat (Triticum aestivum L. and T. turgidum L. var. durum) leaves and its relationship to yield and other parameters was studied in field-grown wheat in 1983 and 1984. The influence of rolling on water loss was estimated by measuring water loss from excised leaves held flat during wilting compared to that from control leaves allowed to roll during wilting. Leaf rolling was visually scored for both excised leaves and for intact plants growing in the field. Leaves which were held flat during wilting lost 9–46% more water than the controls, and there was evidence of genotypic variation in the effect of rolling on water loss. Complete rolling reduced leaf surface area by 41–48%. There were inter- and intragenotypic differences in the amount of water lost by excised durum leaves prior to reaching intermediate and high rolling scores. Percentage water loss before reaching an intermediate rolling score ranged from 20 to 84% across genotypes, and from 24 to 84% within the most variable genotype. There were no consistent correlative relationships between leaf rolling score in field plots and yield and other parameters, probably as a result of intragenotypic differences in expression or rolling. Leaf rolling is unlikely to be of adaptive significance to wheat in environments where stress develops rapidly, but could be of potential use where stress develops gradually or is of short duration. This potential could only be exploited if the low water loss prior to onset of rolling observed in some genotypes is heritable.Key words: Triticum aestivum L., T. turgidum L. var. durum, leaf rolling, leaf water loss, drought, wheat

scholarly journals Response of wheat varieties to salinity: growth, yield and ion analysis

2021 ◽  
Vol 8 (2) ◽  
pp. 301-311
Author(s):  
Hina Nazir ◽  
Humaira Gul ◽  
Mamoona Rauf ◽  
Tabassum Yaseen ◽  
Khushnood Ur Rahman ◽  
...  
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Water Loss ◽  
Electrolyte Leakage ◽  
Relative Water Content ◽  
Leaf Water ◽  
Saline Control ◽  
Wheat Varieties ◽  
Relative Water ◽  
Leaf Water Loss

In plants, development, growth and yield most severely affected through saline soil/water in growth medium, ultimately cause severe threat to global food production for human being. Wheat (Triticum aestivum) is the most edible crop in Pakistan. Production of this crop can be improved through using marginal areas with the help of growing salt-tolerant varieties. The present investigation is carried out to screen out six local wheat varieties (F.Sarhad, Insaf, Lalma, Tatora, Bathoor and Barsat) with reference to their vegetative and reproductive growth, different physiological parameters [relative water content (RWC), electrolyte-leakage (EL) and leaf water loss (LWL)] and ionic status of plants. Present experiment designed in completely randomized manner (CRD) and 54 pots were arranged in the Botanical Garden, Department of Botany. These pots arranged in 6 lines with 9 pots/line and each line was irrigated with non-saline (control), 50 mM and 150 mM NaCl solution. The data from present research revealed that application of salt cause significant reduction in plant-height, root-length, fresh-biomass, dry-biomass, seed number/plant, seed weight/plant, spike-weight, relative water content, leaf water loss, and different ions of plants. Similarly at same applied doses of salt weight of 100 seeds, spike-length, electrolyte-leakage, Na+ and Cl- ions become increased. It has been concluded from the results of present study that varieties F. Sarhad, Insaf and Lalma exhibited more salt tolerance as compare to other varieties. So, these recommended for growing on moderately salt affected soil/water to achieve more yield of wheat from such affected lands of Khyber Pakhtunkhwa, Pakistan.

Excised-leaf water status evaluation and associations in field-grown winter wheat

1993 ◽  
Vol 73 (1) ◽  
pp. 55-63 ◽  
Author(s):  
S. D. Haley ◽  
J. S. Quick ◽  
J. A. Morgan
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Water Loss ◽  
Water Status ◽  
Triticum Aestivum L ◽  
Leaf Water ◽  
Initial Water Content ◽  
Leaf Water Status ◽  
Initial Water ◽  
Selection For

Water status measurements of excised leaves have been proposed as screening criteria for drought resistance in cereal crops. This study was conducted to assess the utility of such measurements in a wheat breeding program, through evaluation of environment and genotype differences in excised-leaf water status and examination of associations with several other traits. Initial water content (IWC) and rate of water loss (RWL) of excised leaves, epicuticular wax content (EW), stomatal frequency (SF), flag leaf area (LA), plant height (HT), heading date (HD), grain yield (GY), and test weight (TW) were measured on 24 winter wheat (Triticum aestivum L.) genotypes grown near Fort Collins, CO, during 1986–1987 and 1987–1988 (F87 and F88, respectively: subirrigated environments) and near Bennett, CO, during 1987–1988 (B88: dryland environment). Differences among genotypes for IWC and RWL were significant for F87 and F88, and nonsignificant for B88. Combined analyses of variance showed significant differences among environments for IWC and RWL. Initial water content was less for B88 than for F87 and F88. Significant genotype × environment (G × E) effects for IWC and RWL suggested that selection for high IWC or low RWL in irrigated environments (F87 and F88) may not provide selections that respond similarly in dryland environments (B88). Correlations for B88 revealed only a small, positive correlation between IWC and GY (r = 0.49*). For F87 and F88, significant correlations were observed between IWC and SF (r = −0.57** and −0.78**), RWL and LA (r = 0.74** and 0.71**), RWL and HT (r = 0.63** and 0.57**), and RWL and HD (r = 0.71** and 0.57**). Neither IWC or RWL were correlated with EW in any environment. Correlations between RWL (subirrigated) and G Y and TW (dryland) suggested that selection for low RWL in irrigated environments could provide some GY or TW advantage in dryland environments, despite observed G × E interaction and lack of RWL differences under the dryland environment. Key words: Cuticular transpiration, Triticum aestivum L., leaf water loss, stomata, drought

scholarly journals Concentration of mineral elements in wheat (Triticum aestivum L.) straw: Genotypic differences and consequences for enzymatic saccharification

2015 ◽  
Vol 75 ◽  
pp. 134-141 ◽  
Author(s):  
Emiko Murozuka ◽  
Thomas C. de Bang ◽  
Jens Frydenvang ◽  
Jane Lindedam ◽  
Kristian H. Laursen ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Enzymatic Saccharification ◽  
Triticum Aestivum L ◽  
Mineral Elements ◽  
Genotypic Differences

Repression of ARF10 by microRNA160 plays an important role in the mediation of leaf water loss

2016 ◽  
Vol 92 (3) ◽  
pp. 313-336 ◽  
Author(s):  
Xin Liu ◽  
Xiufen Dong ◽  
Zihan Liu ◽  
Zihang Shi ◽  
Yun Jiang ◽  
...  
Keyword(s):  
Water Loss ◽  
Leaf Water ◽  
Leaf Water Loss
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