scholarly journals Response of Soft Chess (Bromus mollis) and Slender Oat (Avena barbata) to Simulated Drought Cycles

1983 ◽  
Vol 36 (4) ◽  
pp. 415 ◽  
Author(s):  
Anne L. Ewing ◽  
John W. Menke
Keyword(s):  
Avena Barbata ◽  
Simulated Drought ◽  
Bromus Mollis ◽  
Soft Chess

Genetic Variability in Natural Populations of Softchess (Bromus mollis L.)

Evolution ◽  
1970 ◽  
Vol 24 (4) ◽  
pp. 649 ◽  
Author(s):  
S. K. Jain ◽  
D. R. Marshall ◽  
K. Wu
Keyword(s):  
Genetic Variability ◽  
Natural Populations ◽  
Bromus Mollis

scholarly journals Exogenous DCPTA Increases the Tolerance of Maize Seedlings to PEG-Simulated Drought by Regulating Nitrogen Metabolism-Related Enzymes

Agronomy ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 676 ◽  
Author(s):  
Tenglong Xie ◽  
Wanrong Gu ◽  
Congfeng Li ◽  
Jing Li ◽  
Shi Wei
Keyword(s):  
Drought Tolerance ◽  
Nitrite Reductase ◽  
Glutamate Synthase ◽  
Enzymatic Activities ◽  
Stable Gene ◽  
Maize Seedlings ◽  
Genes Encoding ◽  
Pair Comparisons ◽  
Physiological Indexes ◽  
Simulated Drought

2-(3,4-Dichlorophenoxy) triethylamine (DCPTA) regulates plant development; however, the molecular basis of this regulation is poorly understood. In this study, RNA sequencing (RNA-seq) analysis and physiological indexes of maize seedlings (three-leaf stage) treated with 15% polyethylene glycol (PEG) with/without DCPTA were investigated to explore the possible mechanism of exogenous DCPTA-improved drought tolerance. In the library pair comparisons of DCPTA vs. the control, PEG vs. the control, and PEG + DCPTA vs. PEG, totals of 19, 38 and 20 differentially expressed genes (DEGs) were classified as being involved in metabolic processes, respectively; totals of 5, 11, and 6 DEGs were enriched in the nitrogen (N) metabolic pathway, respectively. The genes encoding nicotinamide adenine dinucleotide-nitrate reductase (NADH-NR), ferredoxin-nitrite reductase (Fd-NiR), reduced ferredoxin- glutamate synthase (Fd-GOGAT), and chloroplastic glutamine synthetase (GS 2) were common in response to PEG-simulated drought stress with/without DCPTA treatment. Moreover, DCPTA maintained stable gene relative expression levels and protein abundances of NADH-NR, Fd-NiR, GS2, and Fd-GOGAT. Moreover, exogenous DCPTA partially mitigated PEG-simulated drought-induced reductions in the enzymatic activities of NR, nitrite reductase (NiR), glutamine synthase (GS), glutamine oxoglutarate aminotransferase (GOGAT), and transaminase, as well as in the contents of nitrate (NO3−), nitrite (NO2−) and soluble proteins and increases in the contents of ammonium (NH4+) and free amino acids. Together, our results indicate that exogenous DCPTA improved plant growth and drought tolerance by regulating N-mechanism enzymatic activities involved in transcription and enzymatic protein synthesis.

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