Copper toxicity in young maize (Zea mays L.) plants: effects on growth, mineral and chlorophyll contents, and enzyme activities

1996 ◽  
Vol 182 (2) ◽  
pp. 287-300 ◽  
Author(s):  
B. Mocquot ◽  
J. Vangronsveld ◽  
H. Clijsters ◽  
M. Mench
Keyword(s):  
Zea Mays ◽  
Enzyme Activities ◽  
Zea Mays L ◽  
Copper Toxicity ◽  
Chlorophyll Contents

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.

Expression of enzyme activities and transcripts required for nitrate assimilation in maize (Zea mays L. A188 × BMS) suspension cell cultures

Plant Science ◽  
1996 ◽  
Vol 119 (1-2) ◽  
pp. 169-181 ◽  
Author(s):  
Margaret G. Redinbaugh ◽  
Steven W. Ritchie ◽  
K.W. Hendrix ◽  
Charles T. MacKown ◽  
W.H. Campbell
Keyword(s):  
Zea Mays ◽  
Cell Cultures ◽  
Enzyme Activities ◽  
Zea Mays L ◽  
Nitrate Assimilation ◽  
Suspension Cell ◽  
Suspension Cell Cultures

scholarly journals Changes in Chlorophyll and Protein Contents of Vigna unguiculata, Glycine max, Zea mays and Sorghum bicolor Raised in Soil Incorporated with the Shoots of Tithonia rotundifolia

2020 ◽  
pp. 33-39
Author(s):  
O. J. Ilori ◽  
O. O. Otusanya
Keyword(s):  
Zea Mays ◽  
Glycine Max ◽  
Sorghum Bicolor ◽  
Vigna Unguiculata ◽  
Zea Mays L ◽  
Block Design ◽  
Protein Accumulation ◽  
Total Chlorophyll ◽  
Chlorophyll Contents ◽  
Sorghum Bicolor L

Tithonia. rotundifolia is an allelopathic weed that grows in association with cultivated crops in Nigeria. Allelopathy is a phenomenon of plant releasing allelochemicals into the environment that can inhibit or stimulate the growth of other plants and microorganisms. This study aimed to evaluate the effects of soil incorporated with the fresh shoots of T. rotundifolia on chlorophyll and protein accumulation of Vigna unguiculata L. Glycine max L., Zea mays L. and Sorghum bicolor L.  250 g of fresh shoots of T. rotundifolia were worked into each plot of 2 m2 dimension and the test crops were sown in the plots. Plots with no T. rotundifolia shoots were included as control plots. The experiment was performed in completely randomized block design (CRBD). The parameters measured were chlorophyll a, chlorophyll b total chlorophyll and protein content. The results showed a stimulation in chlorophyll contents in the test crops except inhibition in chl b and total chlorophyll in Zea mays L. Also, there was a stimulation of protein in Zea mays L. and Sorghum bicolor L. The study suggests that incorporation of shoots of Tithonia rotundifolia could imparts stimulatory allelopathic effects.

scholarly journals Patterns of proteolytic enzyme activities in different tissues of germinating corn (Zea mays L.)

Planta ◽  
1978 ◽  
Vol 140 (2) ◽  
pp. 155-162 ◽  
Author(s):  
U. Feller ◽  
Tai-Sen T. Soong ◽  
R. H. Hageman
Keyword(s):  
Zea Mays ◽  
Enzyme Activities ◽  
Proteolytic Enzyme ◽  
Zea Mays L ◽  
Different Tissues
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