REACTION OF TWO BARLEY CULTIVARS TO A PERIOD OF SOIL WATER STRESS DURING HEADING

1970 ◽  
Vol 50 (6) ◽  
pp. 701-704 ◽  
Author(s):  
S. A. WELLS ◽  
S. DUBETZ
Keyword(s):  
Water Stress ◽  
Hordeum Vulgare ◽  
Soil Fertility ◽  
Soil Water ◽  
Heading Time ◽  
Kernel Size ◽  
Hordeum Vulgare L ◽  
Barley Cultivars ◽  
Soil Water Stress ◽  
The Difference

Two cultivars of barley (Hordeum vulgare L.) grown at three levels of soil fertility in lysimeters protected from natural precipitation by an automatic rain shelter were subjected to two levels of soil water stress at heading time. At all levels of fertility, reductions in yield of Compana resulting from stress were proportionately smaller than those of Betzes, but the difference between cultivars was greatest when no fertilizer was applied. This differential response resulted primarily from a substantial decrease in kernel size of Betzes but a slight increase in that of Compana due to soil water stress. The number of tillers and number of kernels per spike of each cultivar were affected about equally.

scholarly journals Potassium Application Positively Modulates Physiological Responses of Cocoa Seedlings to Drought Stress

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 563
Author(s):  
Esther Anokye ◽  
Samuel T. Lowor ◽  
Jerome A. Dogbatse ◽  
Francis K. Padi
Keyword(s):  
Water Stress ◽  
Soil Water ◽  
Chlorophyll Content ◽  
Electrolyte Leakage ◽  
Seedling Survival ◽  
Biomass Accumulation ◽  
Biomass Partitioning ◽  
Chlorophyll Content And Fluorescence ◽  
Physiological Functions ◽  
Soil Water Stress

With increasing frequency and intensity of dry spells in the cocoa production zones of West Africa, strategies for mitigating impact of water stress on cocoa seedling survival are urgently required. We investigated the effects of applied potassium on biomass accumulation, physiological processes and survival of cocoa varieties subjected to water stress in pot experiments in a gauzehouse facility. Four levels of potassium (0, 1, 2, or 3 g/plant as muriate of potash) were used. Soil water stress reduced plant biomass accumulation (shoot and roots), relative water content (RWC), chlorophyll content and fluorescence. Leaf phenol and proline contents were increased under water stress. Additionally, compared to the well-watered conditions, soils under water stress treatments had higher contents of exchangeable potassium and available phosphorus at the end of the experimental period. Potassium applied under well-watered conditions reduced leaf chlorophyll content and fluorescence and increased leaf electrolyte leakage, but improved the growth and integrity of physiological functions under soil water stress. Potassium addition increased biomass partitioning to roots, improved RWC and leaf membrane stability, and significantly improved cocoa seedling survival under water stress. Under water stress, the variety with the highest seedling mortality accumulated the highest contents of phenol and proline. A significant effect of variety on plant physiological functions was observed. Generally, varieties with PA 7 parentage had higher biomass partitioning to roots and better seedling survival under soil moisture stress. Proportion of biomass partitioned to roots, RWC, chlorophyll fluorescence and leaf electrolyte leakage appear to be the most reliable indicators of cocoa seedling tolerance to drought.

Classification of cultivated barley (Hordeum vulgare). 1. Historical aspects, and phenetic character analysis of some characters by information theory and by spatial autocorrelation

1986 ◽  
Vol 64 (11) ◽  
pp. 2769-2773
Author(s):  
Bernard B. Baum
Keyword(s):  
Information Theory ◽  
Hordeum Vulgare ◽  
Spatial Autocorrelation ◽  
Theory Model ◽  
Kernel Weight ◽  
Hordeum Vulgare L ◽  
Department Of Agriculture ◽  
Character Analysis ◽  
Barley Cultivars

A brief historical sketch of the classification of barley (Hordeum vulgare L.) cultivars is presented along with reference to key reviews on this subject. Characters, utilized in the comprehensive study on the barley cultivars of North America by Aberg and Wiebe (U.S. Department of Agriculture Technical Bulletin 942), were subjected to a series of phenetic character analyses using an information theory model and a spatial autocorrelation model. The ranking of the 48 characters in order of their importance (for classification and identification purposes) from the character analysis by information theory was compared with the previous rating of characters made by Aberg and Wiebe and was found to differ significantly. Numerous trials of character analysis by spatial autocorrelation using various Minkowski distances, setting various values among three parameters, never yielded results comparable with those obtained by Aberg and Wiebe. Among those trials, a few combinations of values for the three parameters (X, Y, and Z) yielded results comparable with those obtained with character analysis by information theory. Those same combinations of values were found by Estabrook and Gates (Taxon, 33: 13–25) in their study of Banisteriopsis in 1984, where they also developed the method of character analysis by spatial autocorrelation. Kernel weight was found to be the most important character.

Simulating the Influences of Soil Water Stress on Leaf Expansion and Senescence of Winter Wheat

2020 ◽  
Vol 291 ◽  
pp. 108061 ◽  
Author(s):  
Tengcong Jiang ◽  
Zihe Dou ◽  
Jian Liu ◽  
Yujing Gao ◽  
Robert W. Malone ◽  
...  
Keyword(s):  
Water Stress ◽  
Winter Wheat ◽  
Soil Water ◽  
Leaf Expansion ◽  
Soil Water Stress
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