scholarly journals The Effect of Water Stress on the Gas Exchange Parameters, Productivity and Seed Health of Buckwheat (Fagopyrum esculentum Moench)

2012 ◽  
Vol 63 (1) ◽  
pp. 67-76 ◽  
Author(s):  
Agnieszka Pszczółkowska ◽  
Gabriel Fordoński ◽  
Tomasz Kulik ◽  
Jacek Olszewski ◽  
Krystyna Płodzień ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Water Stress ◽  
Gas Exchange ◽  
Water Deficit ◽  
Control Treatment ◽  
Fungal Colonization ◽  
Gas Exchange Parameters ◽  
Moisture Contents ◽  
Fagopyrum Esculentum Moench ◽  
Exchange Parameters

The present pot experiment studied the effect of different soil moisture contents (60 - 70% CWC (capillary water capacity) - control; 30 - 35% CWC - water stress) on buckwheat productivity, the gas exchange parameters and health of buckwheat nuts. It was found that water deficit affected adversely certain biometric features investigated (plant height, number of nuts per cluster) and caused a decrease in seed weight per plant. It was also shown that water stress reduced the values of the investigated gas exchange parameters (photosynthesis rate, transpiration rate, intercellular-space CO<sub>2</sub> concentration, and stomatal conductance) relative to the control treatment. Different soil moisture contents did not have a clear effect on fungal colonization of seeds. The multiplex PCR assays did not enable the detection of the genes responsible for mycotoxin synthesis. Under water deficit conditions, an increase was found in the content of albumin and globulin fractions as well as of glutelin fractions.

scholarly journals Productivity and seed health of husked oats (Avena sativa L.) grown under different soil moisture conditions

2012 ◽  
Vol 63 (2) ◽  
pp. 127-133
Author(s):  
Agnieszka Pszczółkowska ◽  
Gabriel Fordoński ◽  
Jacek Olszewski ◽  
Tomasz Kulik ◽  
Iwona Konopka
Keyword(s):  
Soil Moisture ◽  
Gas Exchange ◽  
Soil Water ◽  
Water Deficit ◽  
Treatment Options ◽  
Experimental Treatment ◽  
Gas Exchange Parameters ◽  
Seed Health ◽  
Moisture Conditions ◽  
Exchange Parameters

The present study investigated the effect of different soil moisture content levels (60 - 70% SWC (soil water capacity) - control; 30 - 35% SWC - water stress) on yields, gas exchange parameters, seed health, and protein fractions of husked oat grain. The study showed that water deficit resulted in a decrease in grain weight per plant and a reduction in the gas exchange rates, primarily the photosynthesis and transpiration rates. <i>Cladosporium cladosporioides</i> was the dominant species on oat kernels in both experimental treatment options and in both years of the study. The presence of <i>Fusarium poae</i> was also found. Higher contents of prolamin, albumin and globulin fractions were found in the oat grain harvested from plants grown under soil water deficit conditions.

scholarly journals The complexity-stability hypothesis in plant gas exchange under water deficit

2005 ◽  
Vol 17 (4) ◽  
pp. 363-373 ◽  
Author(s):  
Gustavo M. Souza ◽  
Steven M Pincus ◽  
José Alberto F. Monteiro
Keyword(s):  
Gas Exchange ◽  
Water Deficit ◽  
Temporal Dynamics ◽  
Approximate Entropy ◽  
Exchange Parameter ◽  
Gas Exchange Parameters ◽  
Gas Exchanges ◽  
Respiratory Dynamics ◽  
Net Assimilation ◽  
Exchange Parameters

We hypothesized that more complex, i.e. irregular, temporal dynamics and a more interconnected overall network supports greater stability to gas exchange parameters (herein, CO2 net assimilation and transpiration) in plants under water deficit. To test this hypothesis two genotypes of Phaseolus vulgaris were subjected to a period of absence of irrigation, and subsequent rewatering to achieve recovery. Gas exchanges parameters were measured each 10 s during 6 h to obtain time series to evaluate complexity by Approximate Entropy (ApEn) calculations, and network connectance in each water regime. Notably, the Jalo Precoce genotype showed significantly more stability than the Guarumbé genotype under system perturbation, coincident with greater irregularity in each gas exchange parameter and greater overall connectance for Jalo Precoce. This conclusion is consistent with other observations of greater homeostasis in more complex networks, seen in broad contexts such as cardiac rhythms and respiratory dynamics

scholarly journals Gas exchange parameters in leaves and ears of winter wheat Tricitum aestivum L. and its productivity under fungicide control conditions

2012 ◽  
Vol 63 (2) ◽  
pp. 135-147
Author(s):  
Joanna K. Jarmołkowicz ◽  
Jacek Olszewski
Keyword(s):  
Gas Exchange ◽  
Winter Wheat ◽  
Kernel Weight ◽  
Control Treatment ◽  
Gas Exchange Parameters ◽  
Wheat Varieties ◽  
Research Experiment ◽  
Gas Exchange System ◽  
Exchange Parameters ◽  
Fungicide Control

A research experiment was conducted in which rates of photosynthesis and transpiration were measured in leaves and ears of two winter wheat varieties grown under fungicide control conditions and without fungicide control. A LI-COR 6400 portable gas exchange system was used in the investigations. In most cases the fungicide Juwel was shown to have no effect on the gas exchange processes, whereas the other of the fungicidal agents applied - Swing - significantly decreased the gas exchange rates measured. Measurements of gas exchange parameters in ears showed that the intensity of gas exchange was low, in particular at the later stage of ear development. But the applied fungicide caused higher release of CO<sub>2</sub> into the atmosphere than its uptake. Furthermore, the applied fungicides were found to significantly increase grain yield compared to the control treatment, both in the first and second year of the study. Among the tested varieties, 'Nutka' was characterized by higher productivity, in spite of lower 1000 kernel weight. However, this cultivar developed longer ears with a larger amount of grains.

scholarly journals Estimation of Leaf Water Use Efficiency Threshold Values for Water Stress in Winter Wheat (Triticum aestivum L.)

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Qiu Xinqiang ◽  
Zhang Yushun ◽  
Qin Haixia ◽  
Wang Min ◽  
Wang Yanping ◽  
...  
Keyword(s):  
Water Stress ◽  
Gas Exchange ◽  
Winter Wheat ◽  
Water Use ◽  
Growth Stage ◽  
Severe Drought ◽  
Threshold Values ◽  
Gas Exchange Parameters ◽  
Use Efficiency ◽  
Exchange Parameters

Drought significantly threatens crop productivity and food security worldwide. However, the severity of drought is predicted to increasingly intensify in the future. To provide an antidrought strategy for farmers and breeders, the response of stomatal behavior of crops to water stress should be well studied. In this study, a lysimeter experiment was conducted to study the relationship between gas exchange parameters and grain yields of winter wheat. Light, moderate, and severe drought levels were imposed at seedling, jointing, heading, and filling stages. The results showed that crop evapotranspiration (ETc, mm) of winter wheat during the entire growing season was limited by drought imposed at any growth stage, and ETc under severe drought treatment was always the lowest. The stomatal limitation value had a significant linear correlation with the stomatal conductance (Gs, μmol mol H2O m–2 s–1) and transpiration rate (Tr, mmol H2O m–2 s–1). Light and moderate drought levels at the seedling stage did not generate irreversible physiological stress on wheat plants, while severe drought at any growth stage caused significant reduction in gas exchange parameters and grain yields. Theoretical threshold values of leaf water use efficiency (WUEl) for light, moderate, and severe drought levels were 2.62, 3.36, and 4.11 μmol mmol–1, respectively. The threshold values are useful to provide theoretical reference for achieving smart irrigation in the North China Plain.

Effects of water deficit on gas-exchange parameters and ribulose 1,5-bisphosphate carboxylase activation in wheat

1992 ◽  
Vol 32 (4) ◽  
pp. 403-410 ◽  
Author(s):  
A. Scott Holaday ◽  
Steven W. Ritchie ◽  
Henry T. Nguyen
Keyword(s):  
Gas Exchange ◽  
Water Deficit ◽  
Gas Exchange Parameters ◽  
Bisphosphate Carboxylase ◽  
Exchange Parameters

Effect of Water Deficit on Gas Exchange Parameters, Productivity and Grain Wholesomeness of Spring Wheat

2009 ◽  
Vol 24 (2) ◽  
pp. 85-92 ◽  
Author(s):  
Jacek Olszewski ◽  
Agnieszka Pszczółkowska ◽  
Monika Makowska ◽  
Tomasz Kulik ◽  
Adam Okorski
Keyword(s):  
Gas Exchange ◽  
Water Deficit ◽  
Spring Wheat ◽  
Gas Exchange Parameters ◽  
Effect Of Water ◽  
Exchange Parameters

Soil Moisture and Larval Western Corn Rootworm Injury: Influence on Gas Exchange Parameters in Corn

1997 ◽  
Vol 89 (5) ◽  
pp. 709-717 ◽  
Author(s):  
Xin Hou ◽  
Lance J. Meinke ◽  
Timothy J. Arkebauer
Keyword(s):  
Soil Moisture ◽  
Gas Exchange ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Gas Exchange Parameters ◽  
Exchange Parameters

Effects of chloride and sodium on gas exchange parameters and water relations of Citrus plants

1992 ◽  
Vol 86 (1) ◽  
pp. 115-123 ◽  
Author(s):  
J. Banuls ◽  
E. Primo-Millo
Keyword(s):  
Gas Exchange ◽  
Water Relations ◽  
Gas Exchange Parameters ◽  
Exchange Parameters
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