QTLs for cell wall-bound phenolics in relation to the photosynthetic apparatus activity and leaf water status under drought stress at different growth stages of triticale

2016 ◽  
Vol 292 (2) ◽  
pp. 415-433 ◽  
Author(s):  
Tomasz Hura ◽  
Mirosław Tyrka ◽  
Katarzyna Hura ◽  
Agnieszka Ostrowska ◽  
Kinga Dziurka
Keyword(s):  
Cell Wall ◽  
Drought Stress ◽  
Water Status ◽  
Photosynthetic Apparatus ◽  
Leaf Water ◽  
Growth Stages ◽  
Leaf Water Status ◽  
Bound Phenolics ◽  
Different Growth Stages

scholarly journals The cell wall-bound phenolics as a biochemical indicator of soil drought resistance in winter triticale  

2013 ◽  
Vol 59 (No. 5) ◽  
pp. 189-195 ◽  
Author(s):  
T. Hura ◽  
K. Hura ◽  
A. Ostrowska ◽  
M. Grzesiak ◽  
K. Dziurka
Keyword(s):  
Cell Wall ◽  
Chlorophyll Fluorescence ◽  
Water Status ◽  
Soil Drought ◽  
Leaf Water Status ◽  
Winter Triticale ◽  
Biochemical Indicator ◽  
Drought Conditions ◽  
Free Phenolics ◽  
Bound Phenolics

The leaf dehydration was accompanied by the highest increase in the content of cell wall-bound phenolics (CPh) during heading (148.3% C; % of control) and in course of drought applied twice during propagation and flowering (130.5% C) of triticale. A statistically significant correlations were obtained only for CPh and parameters of leaf water status and chlorophyll fluorescence. An increase in the content of free phenolics (FPh) under drought conditions was only noticed during the flowering (111.4% C) of plants. Drought application exhibited most spectacular decrease in the ratio of FPh to CPh during propagation (48.5% C) and heading (58.8% C). It was found that the cell wall increases at the expense of free phenolic compounds.

DROUGHT RESISTANCE OF Sorghum bicolor. 4. HORMAL CHANGES IN RELATION TO DROUGHT STRESS IN FIELD-GROWN PLANTS

1982 ◽  
Vol 62 (2) ◽  
pp. 317-330 ◽  
Author(s):  
T. KANNANGARA ◽  
R. C. DURLEY ◽  
G. M. SIMPSON ◽  
D. G. STOUT
Keyword(s):  
Drought Stress ◽  
Sorghum Bicolor ◽  
Water Potential ◽  
Leaf Water Potential ◽  
Leaf Senescence ◽  
Water Status ◽  
Leaf Water ◽  
Vegetative Stage ◽  
Leaf Water Status ◽  
Drought Tolerant

This study was undertaken to investigate the nature of hormonal changes in relation to drought stress in two cultivars of Sorghum bicolor L. Moench. Two cultivars, M–35 and NK300, were grown in a field plot protected by a rain shelter. Plants in one soil compartment were stressed by withholding water while those in another (controls) were irrigated frequently. Levels of the plant hormones abscisic acid (ABA), phaseic acid (PA) and indole-3-acetic acid (IAA) measured by high-performance liquid chromatography (HPLC) were determined in the youngest leaves of control and stressed plants at intervals throughout the growth cycle. Plant height, senescence, and leaf water status were also determined. Leaf water potential (ψw) and solute potential (ψs) were reduced in both cultivars by drought stress; values for M–35 plants were lower than NK300. Leaf senescence was higher in M–35 plants and was promoted by stress in both cultivars. Cultivar M–35 behaved as a drought-tolerant plant whereas cultivar NK300 behaved more like a drought avoider. ABA levels were higher in M–35 control plants than in corresponding NK300 plants and levels in both cultivars followed seasonal changes in leaf water potential. Under drought stress, ABA levels increased between 1.5 and 2 times in both cultivars with the largest increases occurring during the vegetative stage in M–35 and during the flowering stage for NK300. PA levels in both cultivars were higher in stressed than in control plants. PA levels in M–35 plants were relatively low and constant throughout the life cycle, whereas in NK300, levels were high until shortly before flowering. IAA levels were higher in NK300 than in M–35 plants, particularly during the vegetative stage. Under drought stress, IAA levels were reduced in both cultivars with a more pronounced reduction in NK300. The high level of ABA in the more drought-tolerant cultivar M–35 was associated with low leaf ψw and ψs and high leaf senescence. On the other hand, in the drought avoider, NK300, high levels of IAA and PA were associated with high leaf ψw and ψs. It is concluded that these cultivars, which differ in their response to drought stress, can be distinguished by their leaf hormone levels.

scholarly journals Stomatal, Proline, and Leaf Water Status Characters of Some Cocoa Clones (Theobroma cacao L.) on Prolonged Dry Season

2017 ◽  
Vol 33 (2) ◽  
pp. 109
Author(s):  
Fakhrusy Zakariyya ◽  
Bayu Setyawan ◽  
Agung Wahyu Susilo
Keyword(s):  
Drought Stress ◽  
El Niño ◽  
El Nino ◽  
Southern Oscillation ◽  
Water Status ◽  
Dry Season ◽  
Leaf Water ◽  
Economic Losses ◽  
Leaf Water Status ◽  
Physiological Characters

ENSO (El Nino Southern Oscillation) occurring in 2015 in Indonesia caused drought stress and the decrease in the percentage of production and even death of plants. One effective and relatively inexpensive way of reducing damage and economic losses due to drought is the availibility of tolerant cocoa. The objective of this research was to obtain tolerant clones based on morpho-physiological characters under drought stress. The experiment was conducted in Kaliwining Experimental Station of Indonesian Coffee and Cocoa Research Institute (ICCRI) during dry season (El Nino period with 5 consecutive dry months, from May to October 2015). Stomata, proline, leaf water status was measured at the peak of dry season on tested cocoa clones. The cocoa clones that predicted tolerant against to drought stress were KW 641, KW 514, KW 535, KW 619, and KW 516, whereas the cocoa clones that predicted susceptible under drought stress were KW 609, KW 614, KW 635, KW 606, and KW 651. The treatment clones had higher values of RWC, leaf proline content, narrower width and length of stomata openings, but smaller value of WSD compared to susceptible clones. Meanwhile, the character of leaf thickness might not significanly different to the character of drought tolerance.

Effect of Soil Drought Stress on Leaf Water Status, Membrane Permeability and Enzymatic Antioxidant System of Maize

Pedosphere ◽  
2006 ◽  
Vol 16 (3) ◽  
pp. 326-332 ◽  
Author(s):  
Li-Ping BAI ◽  
Fang-Gong SUI ◽  
Ti-Da GE ◽  
Zhao-Hui SUN ◽  
Yin-Yan LU ◽  
...  
Keyword(s):  
Drought Stress ◽  
Membrane Permeability ◽  
Antioxidant System ◽  
Water Status ◽  
Leaf Water ◽  
Soil Drought ◽  
Leaf Water Status ◽  
Enzymatic Antioxidant

Employment of artificial neural networks for non-invasive estimation of leaf water status using color features: a case study in Spathiphyllum wallisii

2021 ◽  
Vol 43 (5) ◽  
Author(s):  
Amin Taheri-Garavand ◽  
Abdolhossein Rezaei Nejad ◽  
Dimitrios Fanourakis ◽  
Soodabeh Fatahi ◽  
Masoumeh Ahmadi Majd
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Water Status ◽  
Leaf Water ◽  
Leaf Water Status ◽  
Non Invasive ◽  
Color Features ◽  
Artificial Neural

scholarly journals Quantitative Response of Maize Vcmax25 to Persistent Drought Stress at Different Growth Stages

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1971
Author(s):  
Xingyang Song ◽  
Guangsheng Zhou ◽  
Qijin He ◽  
Huailin Zhou
Keyword(s):  
Drought Stress ◽  
Early Warning Systems ◽  
Growth And Yield ◽  
Leaf Water Content ◽  
Growth Stages ◽  
Leaf Stage ◽  
Maximum Value ◽  
Maize Varieties ◽  
Persistent Drought ◽  
Different Growth Stages

Drought stress has adverse effects on crop growth and yield, and its identification and monitoring play vital roles in precision crop water management. Accurately evaluating the effect of drought stress on crop photosynthetic capacity can provide a basis for decisions related to crop drought stress identification and monitoring as well as drought stress resistance and avoidance. In this study, the effects of different degrees of persistent drought in different growth stages (3rd leaf stage, 7th leaf stage and jointing stage) on the maximum carboxylation rate at a reference temperature of 25 °C (Vcmax25) of the first fully expanded leaf and its relationship to the leaf water content (LWC) were studied in a field experiment from 2013 to 2015. The results indicated that the LWC decreased continuously as drought stress continued and that the LWC decreased faster in the treatment with more irrigation. Vcmax25 showed a decreasing trend as the drought progressed but had no clear relationship to the growth stage in which the persistent drought occurred. Vcmax25 showed a significantly parabolic relationship (R2 = 0.701, p < 0.001) with the LWC, but the different degrees of persistent drought stress occurring in different growth stages had no distinct effect on the LWC values when Vcmax25 reached its maximum value or zero. The findings of this study also suggested that the LWC was 82.5 ± 0.5% when Vcmax25 reached its maximum value (42.6 ± 3.6 μmol m−2 s−1) and 67.6 ± 1.2% (extreme drought) when Vcmax25 reached zero. These findings will help to improve crop drought management and will be an important reference for crop drought identification, classification and monitoring as well as for the development of drought monitoring and early warning systems for other crops or maize varieties.

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