scholarly journals Recovery Processes after Leaf Cutting in Cereals and Forage Grasses : IV. Some physiological changes in rice plants following defoliation

1970 ◽  
Vol 39 (1) ◽  
pp. 15-20
Author(s):  
Kanoe SATO
Keyword(s):  
Physiological Changes ◽  
Forage Grasses ◽  
Rice Plants ◽  
Recovery Processes ◽  
Leaf Cutting

Biological Control of Leaf-Cutting Ants Using Forage Grasses: Nest Characteristics and Fungus Growth

2001 ◽  
Vol 187 (4) ◽  
pp. 259-267 ◽  
Author(s):  
K. Michels ◽  
N. Cromme ◽  
A. Glatzle ◽  
R. Schultze-Kraft
Keyword(s):  
Biological Control ◽  
Forage Grasses ◽  
Leaf Cutting ◽  
Fungus Growth

scholarly journals Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1

2016 ◽  
Vol 34 (2) ◽  
pp. 277-290 ◽  
Author(s):  
A.C. LANGARO ◽  
D. AGOSTINETTO ◽  
C. OLIVEIRA ◽  
J.D.G. SILVA ◽  
M.S. BRUNO
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Antioxidant Enzyme Activity ◽  
Proline Accumulation ◽  
Photosynthetic Parameters ◽  
Oxygen Species ◽  
Physiological Changes ◽  
Defense Strategies ◽  
Rice Plants ◽  
Activity Of Enzymes

ABSTRACT The application of herbicides, even if selective, can cause biochemical and physiological changes, resulting in oxidative stress. This stress comes from the accumulation of reactive oxygen species produced due to exposure to the herbicide. However, plants have developed defense strategies, which can be enzymatic or non-enzymatic. The objective of this study was to evaluate the morphological and metabolic changes such as photosynthetic parameters, oxidative damage and antioxidant enzyme activity of rice plants after applying herbicides. For this, a study was conducted in a greenhouse and laboratory and the treatments consisted of application of imazapic + imazapyr, quinclorac, bentazon, cyhalofop-butyl, penoxsulan, bispyribac-sodium and carfentrazone-ethyl, in addition to control without herbicide. The phytotoxicity in plants was strong and there was a reduction in photosynthesis, stomatal conductance and efficiency of water use in plants treated with carfentrazone-ethyl. Furthermore, the application of carfentrazone-ethyl resulted in lower chlorophylls and carotenoids and increased lipid peroxidation and proline accumulation. Changes in the activity of enzymes belonging to the antioxidant system were inspected by applying herbicides. The application of herbicide alters the physiology of rice plants, triggering responses to oxidative stress, which are more pronounced when used carfentrazone-ethyl.

Inducing Unconscious Stress

2020 ◽  
Vol 34 (3) ◽  
pp. 192-201
Author(s):  
Melanie M. van der Ploeg ◽  
Jos F. Brosschot ◽  
Markus Quirin ◽  
Richard D. Lane ◽  
Bart Verkuil
Keyword(s):  
Repeated Measures ◽  
Activity Patterns ◽  
Physiological Changes ◽  
Implicit Measures ◽  
Prime Word ◽  
Student Sample ◽  
Priming Task ◽  
Subject Design ◽  
The Relationship ◽  
Stress And Health

Abstract. Stress-related stimuli may be presented outside of awareness and may ultimately influence health by causing repetitive increases in physiological parameters, such as blood pressure (BP). In this study, we aimed to corroborate previous studies that demonstrated BP effects of subliminally presented stress-related stimuli. This would add evidence to the hypothesis that unconscious manifestations of stress can affect somatic health. Additionally, we suggest that these findings may be extended by measuring affective changes relating to these physiological changes, using measures for self-reported and implicit positive and negative affectivity. Using a repeated measures between-subject design, we presented either the prime word “angry” ( n = 26) or “relax” ( n = 28) subliminally (17 ms) for 100 trials to a student sample and measured systolic and diastolic BP, heart rate (HR), and affect. The “angry” prime, compared to the “relax” prime, did not affect any of the outcome variables. During the priming task, a higher level of implicit negative affect (INA) was associated with a lower systolic BP and diastolic BP. No association was found with HR. Self-reported affect and implicit positive affect were not related to the cardiovascular (CV) activity. In sum, anger and relax primes elicited similar CV activity patterns, but implicit measures of affect may provide a new method to examine the relationship between (unconscious) stress and health.

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