Alleviation of salinity stress on germination ofLeymus chinensisseeds by plant growth regulators and nitrogenous compounds under contrasting light/dark conditions

2015 ◽  
Vol 71 (3) ◽  
pp. 497-506 ◽  
Author(s):  
Y. P. Wu ◽  
F. Chen ◽  
X. W. Hu ◽  
C. C. Baskin ◽  
J. M. Baskin
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Salinity Stress ◽  
Growth Regulators ◽  
Nitrogenous Compounds ◽  
Dark Conditions

scholarly journals Roles of Some Plant Growth Regulators on Natural and Dark-Induced Senescence in Wheat Leaf Segments

2019 ◽  
Vol 47 (4) ◽  
pp. 1230-1237
Author(s):  
Nihal GÖREN-SAĞLAM ◽  
Fazilet Özlem ÇEKIÇ
Keyword(s):  
Cell Death ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Digital Object Identifier ◽  
Light Conditions ◽  
Wheat Leaf ◽  
Gaba Content ◽  
Leaf Segments ◽  
Dark Conditions

Senescence is an important developmental process in the life span of a plant. It is affected by several endogenous and exogenous factors such as hormones, darkness, and drought. Hormones are major endogenous factors that affect senescence intensively. In this study, our aim was to investigate the effects of different plant growth regulators; benzyl adenin (BA), spermine (Spm) and spermidine (Spd) on both natural and dark-induced senescence and on γ-aminobutyric acid (GABA) content in wheat leaf segments. Following the incubation, fresh and dry weight, chlorophyll and carotenoid contents; peroxidase activity, soluble protein, GABA and malondialdehyde (MDA) contents and cell death amount were determined. Our results demonstrate that Spm and Spd accelerated senescence under light and delayed it under dark conditions. BA has delayed leaf senescence under both conditions. Cell death and MDA content showed a correlation with the senescence process. GABA content was enhanced considerably by BA, Spm and Spd applications under light conditions. According to our results we can conclude that Spm and Spd could promote senescence on wheat segments under light conditions, whereas inhibit senescence under dark conditions. In addition, BA could retard the deleterious effects on senescence under both light and dark conditions.   ********* In press - Online First. Article has been peer reviewed, accepted for publication and published online without pagination. It will receive pagination when the issue will be ready for publishing as a complete number (Volume 47, Issue 4, 2019). The article is searchable and citable by Digital Object Identifier (DOI). DOI link will become active after the article will be included in the complete issue. *********

PGRs and nutrient consortium effect on water relations, photosynthesis, catalase enzyme and yield of blackgram under salinity stress

2019 ◽  
Author(s):  
R. Sivakumar and S. Jaya Priya
Keyword(s):  
Ascorbic Acid ◽  
Salicylic Acid ◽  
Plant Growth ◽  
Jasmonic Acid ◽  
Water Potential ◽  
Plant Growth Regulators ◽  
Salinity Stress ◽  
Growth Regulators ◽  
Chlorophyll Index ◽  
Benzyl Amino Purine

An experiment was conducted to study the effect of plant growth regulators namely jasmonic acid (50 µM), brassinolide (0.5 ppm), salicylic acid (100 ppm), ascorbic acid (100 ppm), gibberellic acid (10 ppm), benzyl amino purine (5 ppm) and nutrient consortium (K2SO4 (0.5%) + FeSO4 (0.5%) + Borax (0.3%) and TNAU Pulse Wonder (1%) on blackgram (Vigna mungo L.) variety TNAU (Blackgram) CO 6 under salinity condition. The salinity was imposed by 125 mM NaCl concentration in pot culture. Plant growth regulators and nutrient consortium were used as foliar spray at 20 and 40 days after sowing except jasmonic acid, which used as seed soaking. Under salinity stress, water potential, relative water content (RWC), photosynthetic rate, chlorophyll index and yield were significantly reduced as compared to control. Among the treatments, brassinolide and TNAU Pulse Wonder showed supremacy to enhance water potential, RWC and yield compared to other treatments. Salicylic acid performed better to stabilize the photosynthetic rate under salinity followed by TNAU Pulse Wonder. Benzyl amino purine had higher chlorophyll index than other treatments. Increased catalase activity was observed in brassinolide treated plants followed by salicylic acid and ascorbic acid under salinity.

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