scholarly journals A STUDY OF DROUGHT TOLERANCE IN SWEETPOTATOES

HortScience ◽  
1991 ◽  
Vol 26 (5) ◽  
pp. 497c-497
Author(s):  
Lavetta L. Newell ◽  
James O. Garner
Keyword(s):  
Weight Loss ◽  
Drought Tolerance ◽  
Water Loss ◽  
Ipomoea Batatas ◽  
Dry Weight ◽  
Leaf Water ◽  
Transport Activity ◽  
Detached Leaf ◽  
Leaf Water Loss ◽  
Loss Method

In two experiments, 16 sweetpotato genotypes (Ipomoea batatas L.) were evaluated for drought tolerance using the detached-leaf water loss method. Dry weight loss was also determined. Difference in the rate of leaf water loss over a 48 hour period were found. `Vardaman' had the greatest amount of dry weight loss and the least amount of water loss. No relationship between dry weight loss and water loss was found. When measuring chlorophyll fluorescence using two sweetpotato genotypes, `Vardaman' had a higher rate of photosynthetic transport activity.

SCREENING SWEET POTATOES FOR DROUGHT TOLERANCE

HortScience ◽  
1990 ◽  
Vol 25 (8) ◽  
pp. 863b-863
Author(s):  
Lavetta Newell ◽  
Tonda Bardwell ◽  
James O. Garner
Keyword(s):  
Drought Tolerance ◽  
Water Loss ◽  
Ipomoea Batatas ◽  
Dry Matter ◽  
Dry Weight ◽  
Leaf Water ◽  
Sweet Potatoes ◽  
Dry Matter Loss ◽  
Leaf Water Loss ◽  
Loss Method

In two experiments, 16 sweet potato genotypes (Ipomoea batatas L.) were evaluated for drought tolerance using the detached - leaf water loss method as reported by Walker and Miller (1986). Dry weight loss was also determined. Differences in the rate of leaf water loss over a 48 hour period were found. Vardaman had the greatest amount of dry matter loss and the lowest level of water loss. However, no relationship between dry matter loss and water loss was found.

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

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

scholarly journals Genetic analysis of water loss of excised leaves associated with drought tolerance in wheat

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5063 ◽  
Author(s):  
Ilona Mieczysława Czyczyło-Mysza ◽  
Izabela Marcińska ◽  
Edyta Skrzypek ◽  
Jan Bocianowski ◽  
Kinga Dziurka ◽  
...  
Keyword(s):  
Cross Sections ◽  
Water Loss ◽  
Unit Area ◽  
Doubled Haploids ◽  
Leaf Size ◽  
Leaf Traits ◽  
Leaf Length ◽  
Detached Leaf ◽  
Length Width ◽  
Leaf Water Loss

Background Wheat is widely affected by drought. Low excised-leaf water loss (ELWL) has frequently been associated with improved grain yield under drought. This study dissected the genetic control of ELWL in wheat, associated physiological, morphological and anatomical leaf traits, and compared these with yield QTLs. Methods Ninety-four hexaploid wheat (Triticum aestivum L.) doubled haploids, mapped with over 700 markers, were tested for three years for ELWL from detached leaf 4 of glasshouse-grown plants. In one experiment, stomata per unit area and leaf thickness parameters from leaf cross-sections were measured. QTLs were identified using QTLCartographer. Results ELWL was significantly negatively correlated with leaf length, width, area and thickness. Major QTLs for ELWL during 0–3 h and 3–6 h were coincident across trials on 3A, 3B, 4B, 5B, 5D, 6B, 7A, 7B, 7D and frequently coincident (inversely) with leaf size QTLs. Yield in other trials was sometimes associated with ELWL and leaf size phenotypically and genotypically, but more frequently under non-droughted than droughted conditions. QTL coincidence showed only ELWL to be associated with drought/control yield ratio. Discussion Our results demonstrated that measures of ELWL and leaf size were equally effective predictors of yield, and both were more useful for selecting under favourable than stressed conditions.

CANOPY TEMPERATURES AND EXCISED LEAF WATER LOSS OF TEF (ERAGROSTIS TEF [ZUCC.] TROTTER.) CULTIVARS UNDER WATER DEFICIT CONDITIONS AT ANTHESIS

2001 ◽  
Vol 49 (2) ◽  
pp. 109-117 ◽  
Author(s):  
A. Takele
Keyword(s):  
Water Deficit ◽  
Water Loss ◽  
Canopy Temperature ◽  
Leaf Water ◽  
Eragrostis Tef ◽  
Plant Water Stress ◽  
Significant Difference ◽  
Leaf Water Loss ◽  
Diverse Origin ◽  
The Difference

This experiment was carried out to evaluate the canopy temperatures and excised leaf water loss (ELWL) of tef cultivars under water deficit conditions at anthesis and to demonstrate that these indices are reliable indicators of plant water stress. Twelve tef cultivars of similar maturity group but diverse origin were grown in each of two seasons under stressed and non-stressed conditions at anthesis. Mean cultivar canopy temperatures ranged from 33.2 to 34.9°C and 32.2 to 33.8°C in 1998 and 1999, respectively. There was also a significant difference in canopy temperature between treatments. The canopy temperature of stressed plants was 10.7% and 11.4% higher than that of non-stressed plants in 1998 and 1999, respectively. Under stress conditions the canopy temperature of the cultivars ranged from 33.6 to 36.7°C and from 33.1 to 37.6°C in 1998 and 1999, respectively, as compared to the non-stressed plants which ranged from 32.1 to 34.5°C in 1998 and from 29.7 to 31.9°C in 1999. There was a marked difference in mean excised leaf water loss (ELWL) values between the stressed and non-stressed treatments. There was also a differential response among tef cultivars for ELWL in response to the water deficit treatments during 1998 and 1999. Under non-stressed conditions the values of ELWL ranged between 1.5 g/g/h to 2.1 g/g/h in 1998 and 0.8 g/g/h to 1.7 g/g/h in 1999, whereas under stressed conditions the ELWL of the cultivars ranged from 1.0 g/g/h to 1.8 g/g/h and 0.7 g/g/h to 1.3 g/g/h in 1998 and 1999, respectively. The difference between the cultivars for both canopy temperatures and ELWL in response to the water deficit treatment was greater during 1999 than in 1998. It was concluded that both canopy temperatures and ELWL were suitable methods for the screening of drought resistant tef cultivars since differences between cultivars were detected.

Silicon Leaf Fertilization Promotes Biofortification and Increases Dry Matter, Ascorbate Content, and Decreases Post-Harvest Leaf Water Loss of Chard and Kale

2018 ◽  
Vol 50 (2) ◽  
pp. 164-172
Author(s):  
José Zenóbio De Souza ◽  
Renato De Mello Prado ◽  
Sylvia Letícia de Oliveira Silva ◽  
Thiago Palhares Farias ◽  
Júlio Garcia Neto ◽  
...  
Keyword(s):  
Water Loss ◽  
Dry Matter ◽  
Leaf Water ◽  
Post Harvest ◽  
Leaf Water Loss
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