scholarly journals Natural variation of hormone levels in Arabidopsis roots and correlations with complex root architecture

2018 ◽  
Vol 60 (4) ◽  
pp. 292-309 ◽  
Author(s):  
Sangseok Lee ◽  
Lidiya I. Sergeeva ◽  
Dick Vreugdenhil
Keyword(s):  
Root Architecture ◽  
Natural Variation ◽  
Complex Root ◽  
Hormone Levels

scholarly journals Persistent homology: a tool to universally measure plant morphologies across organs and scales

2017 ◽  
Author(s):  
Mao Li ◽  
Margaret H. Frank ◽  
Viktoriya Coneva ◽  
Washington Mio ◽  
Christopher N. Topp ◽  
...  
Keyword(s):  
Mathematical Method ◽  
Root Architecture ◽  
Natural Variation ◽  
Persistent Homology ◽  
Plant Morphology ◽  
Introgression Line ◽  
Mathematical Methods ◽  
Solanum Pennellii ◽  
Genetic Contributions ◽  
Robust To Noise

AbstractGenetic contributions to plant morphology are not partitioned between shoots and roots. Yet, shoot and root architectures are rarely measured in the same plants. Even if shoot and root architectures are both studied, the application of mathematical methods flexible enough to accommodate the disparate topologies and shapes within a plant, and across scales, are lacking. Here, we advocate the use of persistent homology, a mathematical method robust to noise, invariant with respect to orientation, capable of application across diverse scales, and importantly, compatible with diverse functions to quantify disparate plant morphologies, architectures, and textures. To demonstrate the usefulness of this method, we apply persistent homology approaches to the shape of leaves, serrations, and root architecture as measured in the same plants of a domesticated tomato Solanum pennellii near-isogenic introgression line population under field conditions. We find that genetic contributions to morphology affect the plant in a concerted fashion, affecting both the shoot and root, revealing a pleiotropic basis to natural variation in tomato.

Natural variation of Arabidopsis thaliana root architecture in response to nitrate availability

2019 ◽  
Vol 42 (7) ◽  
pp. 723-736
Author(s):  
Jianfu Li ◽  
Xiaoyun Song ◽  
Xiuzhen Kong ◽  
Jun Wang ◽  
Wenjie Sun ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Architecture ◽  
Natural Variation ◽  
Nitrate Availability

Changes in root architecture and endogenous hormone levels in two Malus rootstocks under alkali stress

2018 ◽  
Vol 235 ◽  
pp. 198-204 ◽  
Author(s):  
Tian Wen ◽  
Lijuan Dong ◽  
Lei Wang ◽  
Fengwang Ma ◽  
Yangjun Zou ◽  
...  
Keyword(s):  
Root Architecture ◽  
Endogenous Hormone ◽  
Alkali Stress ◽  
Hormone Levels

Effect of the Oestrus Cycle on Coxofemoral Joint Laxity

1997 ◽  
Vol 10 (02) ◽  
pp. 69-74 ◽  
Author(s):  
G. K. Smith ◽  
M. G. Conzemius ◽  
H. M. Saunders ◽  
C. M. Hill ◽  
T. P. Gregor ◽  
...  
Keyword(s):  
Prospective Study ◽  
Hip Dysplasia ◽  
Joint Laxity ◽  
Hormone Levels ◽  
Oestrus Cycle ◽  
Clinically Significant ◽  
A Prospective Study

SummaryA few investigations in the 1960’s were performed to document the effect of exogenous oestrogens on development of hip dysplasia. These projects concluded that oestrogen administration caused a significant increase in hip dysplasia. Additionally, the Orthopaedic Foundation for Animals (OFA) has recommended that bitches should not have hip evaluation for certification during oestrus, due to the possibility of increased coxofemoral joint laxity. The purpose of this project was to determine if physiological fluctuations of oestrogen and progesterone throughout the oestrus cycle significantly affected coxofemoral joint laxity. Nine bitches were evaluated through a single oestrus cycle. Although significant fluctuations of oestrogen and progesterone occurred throughout the phases of the oestrus cycle, neither statistically nor clinically significant changes in coxofemoral joint laxity were documented.A prospective study documented the effect of fluctuations of hormone levels throughout the oestrus cycle on coxofemoral joint laxity in nine dogs. Although oestrogen and progesterone levels changed significantly throughout the oestrus cycle, neither statistically nor clinically significant changes in hip laxity were observed.

THE EFFECT OF THE PROGESTOGEN ETHYNODIOL DIACETATE ON GLUCOSE, INSULIN, AND GROWTH HORMONE AFTER SIX MONTHS TREATMENT

1972 ◽  
Vol 70 (2) ◽  
pp. 373-384 ◽  
Author(s):  
W. N. Spellacy ◽  
W. C. Buhi ◽  
S. A. Birk
Keyword(s):  
Growth Hormone ◽  
Blood Glucose ◽  
Plasma Insulin ◽  
Tolerance Test ◽  
Metabolic Effects ◽  
Oral Glucose ◽  
Hormone Levels ◽  
Glucose Levels ◽  
Ethynodiol Diacetate ◽  
Tolerance Curve

ABSTRACT Seventy-one women were treated with a daily dose of 0.25 mg of the progestogen ethynodiol diacetate. They were all tested with a three-hour oral glucose tolerance test before beginning the steroid and then again during the sixth month of use. Measurements were made of blood glucose and plasma insulin and growth hormone levels. There was a significant elevation of the blood glucose levels after steroid treatment as well as a deterioration in the tolerance curve in 12.9% of the women. The plasma insulin values were also elevated after drug treatment whereas the fasting ambulatory growth hormone levels did not significantly change. There was a significant association between the changes in glucose and insulin levels and the subject's age, control weight, or weight gain during treatment. The importance of considering the metabolic effects of the progestogen component of oral contraceptives is stressed.

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