Effects of Exogenous Spermidine on Photosystem II of Wheat Seedlings Under Water Stress

2006 ◽  
Vol 48 (8) ◽  
pp. 920-927 ◽  
Author(s):  
Hui-Guo Duan ◽  
Shu Yuan ◽  
Wen-Juan Liu ◽  
De-Hui Xi ◽  
Dong-Hong Qing ◽  
...  
Keyword(s):  
Water Stress ◽  
Photosystem Ii ◽  
Wheat Seedlings ◽  
Exogenous Spermidine

scholarly journals The influence of exogenous spermidine on polysomes and RNase activity in wheat leaves under water stress conditions short communication

2014 ◽  
Vol 63 (1) ◽  
pp. 25-28 ◽  
Author(s):  
Halina Gniazdowska-Skoczek ◽  
Zenon Krzywański ◽  
Jan Kubiś
Keyword(s):  
Water Stress ◽  
Short Communication ◽  
The State ◽  
Stress Conditions ◽  
Rnase Activity ◽  
Wheat Seedlings ◽  
Wheat Leaves ◽  
Exogenous Spermidine ◽  
Polysome Fraction

It was found that spermidine (5mM) delivered to wheat seedlings through their roots prior to water stress affected the state of polysomes and ribosomes under water stress conditions, which was manifested in stabilization of 80 S ribosomes and in reduction of polysome fraction. Besides, it was observed that pretreatement with spermidine decreases RNase activity in plants exposed to water stress.

Alteration in photosystem II photochemistry of thylakoids isolated from senescing leaves of wheat seedlings

1993 ◽  
Vol 20 (2-3) ◽  
pp. 197-202 ◽  
Author(s):  
P.N. Joshi ◽  
N.K. Ramaswamy ◽  
M.K. Raval ◽  
T.S. Desai ◽  
P.M. Nair ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Wheat Seedlings ◽  
Photosystem Ii Photochemistry

H2S induces NO in the regulation of AsA-GSH cycle in wheat seedlings by water stress

PROTOPLASMA ◽  
2020 ◽  
Vol 257 (5) ◽  
pp. 1487-1493 ◽  
Author(s):  
Changjuan Shan ◽  
Baoshi Wang ◽  
Haili Sun ◽  
Shang Gao ◽  
Hua Li
Keyword(s):  
Water Stress ◽  
Wheat Seedlings

scholarly journals Protective Effects of Selenium on Wheat Seedlings under Salt Stress

Agronomy ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 272 ◽  
Author(s):  
Chiu-Yueh Lan ◽  
Kuan-Hung Lin ◽  
Wen-Dar Huang ◽  
Chang-Chang Chen
Keyword(s):  
Salt Stress ◽  
Chlorophyll Fluorescence ◽  
Energy Dissipation ◽  
Quantum Yield ◽  
Photosystem Ii ◽  
Physiological Traits ◽  
Effective Quantum Yield ◽  
Enzymatic Antioxidants ◽  
Wheat Seedlings ◽  
Chlorophyll Fluorescence Parameters

Wheat is a staple food worldwide, but its productivity is reduced by salt stress. In this study, the mitigative effects of 22 μM selenium (Se) on seedlings of the wheat (Triticum aestivum L.) cultivar Taichung SEL. 2 were investigated under different salt stress levels (0, 100, 200, 300, and 400 mM NaCl). Results of the antioxidative capacity showed that catalase (CAT) activity, non-enzymatic antioxidants (total phenols, total flavonoids, and anthocyanins), 1,1-Diphenyl-2-Picryl-Hydrazyl (DPPH) radical-scavenging activity, and the reducing power of Se-treated seedlings were enhanced under saline conditions. The more-stabilized chlorophyll fluorescence parameters (maximal quantum yield of photosystem II (Fv/Fm), minimal chlorophyll fluorescence (F0), effective quantum yield of photosystem II (ΦPSII), quantum yield of regulated energy dissipation of photosystem II (Y(NPQ)), and quantum yield of non-regulated energy dissipation of photosystem II (Y(NO)) and the less-extensive degradation of photosynthetic pigments (total chlorophyll and carotenoids) in Se-treated seedlings were also observed under salt stress. The elongation of shoots and roots of Se-treated seedling was also preserved under salt stress. Protection of these physiological traits in Se-treated seedlings might have contributed to stable growth observed under salt stress. The present study showed the protective effect of Se on the growth and physiological traits of wheat seedlings under salt stress.

scholarly journals Alleviation of nickel toxicity in wheat (Triticum aestivum L.) seedlings by selenium supplementation

2013 ◽  
Vol 50 (2) ◽  
pp. 65-78 ◽  
Author(s):  
Ewa Gajewska ◽  
Daniel Drobik ◽  
Marzena Wielanek ◽  
Joanna Sekulska-Nalewajko ◽  
Jarosław Gocławski ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Chlorophyll A ◽  
Electrolyte Leakage ◽  
Growth Parameters ◽  
Photosynthetic Pigment ◽  
Triticum Aestivum L ◽  
Photochemical Activity ◽  
Wheat Seedlings ◽  
Chlorophyll A And B ◽  
Hydroponically Grown

Abstract Hydroponically grown wheat seedlings were treated with 50 μM N i and/or 15 μM Se. After a 7-day culture period, their growth parameters, N i, Se, F e, and M g contents, electrolyte leakage, photosynthetic pigment concentrations, and photochemical activity of photosystem II were determined. Exposure of wheat seedlings to N i alone resulted in reduction in the total shoot and root lengths, by 22% and 50%, respectively. Addition of Se to the N i-containing medium significantly improved the growth of these organs, compared to the seedlings subjected to N i alone. Application of Se decreased the accumulation of N i in shoots and roots and partially alleviated the N i-induced decrease in F e and M g concentations in shoots. Electrolyte leakage increased in response to N i stress, but in shoots it was diminished by Se supplementation. Exposure to N i led to a decrease in chlorophyll a and b contents and enhancement of chlorophyll a/b ratio, but did not influence the concentration of carotenoids. Enrichment of the N i-containing medium with Se significantly increased chlorophyll b content, compared to the seedlings treated with N i alone. Photochemical activity, estimated in terms of the maximum quantum yield of photosystem II , decreased in response to N i treatment but was significantly improved by simultaneous addition of Se. Results of our study suggest that alleviation of N i toxicity in wheat seedlings by Se supplementation may be related to limitation of N i uptake.

Deletion analysis of genes regulating cold- and PEG-induced carbohydrate accumulation in hydroponically raised wheat seedlings

2005 ◽  
Vol 53 (4) ◽  
pp. 359-370 ◽  
Author(s):  
G. Galiba ◽  
I. Kerepesi ◽  
J. W. Snape ◽  
A. Vágújfalvi
Keyword(s):  
Water Stress ◽  
Cold Hardiness ◽  
Water Deprivation ◽  
Time Course ◽  
Cold Treatment ◽  
Sugar Accumulation ◽  
Carbohydrate Accumulation ◽  
Wheat Seedlings ◽  
Time Course Experiment ◽  
Vernalization Genes

The mobilization of carbohydrates, especially sucrose, is considered very important during both the cold acclimation process and water stress, while sugars also promote floral transition and cold hardiness. Chinese Spring (CS) 5AL and 5DL deletion lines were studied for the physical assignment of the gene(s) regulating stress-induced sugar accumulation. To separate the effect of cold from that of water deprivation, the seedlings were raised in hydroponics, and apart from the cold, the effect of PEG-induced water stress was also evaluated in a time course experiment. The genes affecting stress-induced carbohydrate accumulation were assigned to the same chromosomal bins, which contain the vernalization genes Vrn-A1and Vrn-D1, on the long arms of chromosomes 5A and 5D, respectively. Sugar accumulation was found to be controlled by Vrngenes in an epistatic manner at least at the beginning of the cold treatment. In the case of cold treatment, Vrn-A1proved to be more effective than Vrn-D1, while in the case of osmotic stress the gene assigned to the long arm of chromosome 5D seemed to be more effective at regulating sugar accumulation than its counterpart on 5A.

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