Nitric oxide regulates water status and associated enzymatic pathways to inhibit nutrients imbalance in maize (Zea mays L.) under drought stress

2020 ◽  
Vol 155 ◽  
pp. 147-160
Author(s):  
Sadia Majeed ◽  
Fahim Nawaz ◽  
Muhammad Naeem ◽  
Muhammad Yasin Ashraf ◽  
Samina Ejaz ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Zea Mays ◽  
Drought Stress ◽  
Zea Mays L ◽  
Water Status ◽  
Enzymatic Pathways

scholarly journals   Arbuscular mycorrhizae improves photosynthesis and water status of Zea mays L. under drought stress

2012 ◽  
Vol 58 (No. 4) ◽  
pp. 186-191 ◽  
Author(s):  
X.C. Zhu ◽  
F.B. Song ◽  
S.Q. Liu ◽  
T.D. Liu ◽  
X. Zhou
Keyword(s):  
Zea Mays ◽  
Drought Stress ◽  
Zea Mays L ◽  
Water Status ◽  
Chlorophyll Concentration ◽  
Photochemical Efficiency ◽  
Fluorescence Maximum ◽  
Psii Photochemistry ◽  
Maize Plants ◽  
Mycorrhizal Plants

The influences of arbuscular mycorrhizal (AM) fungus on growth, gas exchange, chlorophyll concentration, chlorophyll fluorescence and water status of maize (Zea mays L.) plants were studied in pot culture under well-watered and drought stress conditions. The maize plants were grown in a sand and black soil mixture for 4 weeks, and then exposed to drought stress for 4 weeks. Drought stress significantly decreased AM colonization and total dry weight. AM symbioses notably enhanced net photosynthetic rate and transpiration rate, but decreased intercellular CO<sub>2</sub> concentration of maize plants regardless of water treatments. Mycorrhizal plants had higher stomatal conductance than non-mycorrhizal plants under drought stress. The concentrations of chlorophyll were higher in mycorrhizal than non-mycorrhizal plants under drought stress. AM colonization significantly increased maximal fluorescence, maximum quantum efficiency of PSII photochemistry and potential photochemical efficiency, but decreased primary fluorescence under well-watered and droughted conditions. Mycorrhizal maize plants had higher relative water content and water use efficiency under drought stress compared with non-mycorrhizal plants. The results indicated that AM symbiosis alleviates the toxic effect of drought stress via improving photosynthesis and water status of maize plants. &nbsp;

scholarly journals Exogenous Nitric Oxide Confers Tolerance to Cr(VI) in Maize (Zea mays L.) Seedlings by Modulating Endogenous Oxido-Nitrosative Events

2021 ◽  
Author(s):  
Oussama Kharbech ◽  
Marouane Ben Massoud ◽  
Abdelilah Chaoui ◽  
Luis Alejandro Jose Mur ◽  
Wahbi Djebali
Keyword(s):  
Nitric Oxide ◽  
Zea Mays ◽  
Zea Mays L ◽  
Exogenous Nitric Oxide

scholarly journals Nitric Oxide as an Attenuator of Ecophysiological Changes in Corn (Zea mays L.) Plants Submitted to Copper Toxicity

2021 ◽  
Vol 8 (4) ◽  
pp. 735
Author(s):  
Ana Ecidia de Araújo Brito ◽  
Jessica Suellen Silva Teixeira ◽  
Diana Jhulia Palheta de Sousa ◽  
Evelyn Fátima Lima de Souza ◽  
Gabriel Ito dos Santos Teixeira ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Zea Mays ◽  
Sodium Nitroprusside ◽  
Zea Mays L ◽  
Copper Toxicity ◽  
Maximum Activity ◽  
Nitric Oxide Donor ◽  
Water Control ◽  
Ps Ii ◽  
Corn Plants

The aim of this work was to evaluate the attenuating effect of the nitric oxide donor (sodium nitroprusside-NPS) on the ecophysiological responses of corn plants (Zea mays L.) submitted to copper toxicity. The corn seeds of the K9606 VIP3 variety were soaked for 48 hours in Germitest with solution containing treatment with sodium nitroprusside Na2 [Fe (CN) 5 NO] 2H2O (0, 200 and 300µM), sodium ferrocyanide Na4Fe (CN) 6 ( 300, 100 and 0 µM) respectively and deionized water (control), sown in buckets with 15 kg of soil incubated for 50 days containing copper concentrations CuSO4.5H2O (0, 60 and 200 mg kg-1). The design consisted of randomized blocks with 12 treatments and 4 repetitions, making a total of 48 plants. in ecophysiological variables: height, leaf area and number of leaves, stem diameter increased by 32, 66% and 11.29% in the treatments with 60 mg kg-1 of copper and 200 mg kg-1 of copper, respectively. There was no effect of treatments on the chlorophyll content measured by the SPAD index and gas exchange. The chlorophyll a fluorescence variables indicate that the concentration of 200 mg kg-1 of copper caused damage to the structure of the PS II reaction center complexes and indicate a slightly protective effect of nitric oxide-NO present in sodium nitroprusside and cyanide present in sodium ferrocyanide, reflecting a smooth functioning of the maximum activity of photosystem II and the electron transport chain.

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