Growth parameters and photosynthetic pigments in leaf segments of Zea mays exposed to cadmium, as related to protection mechanisms

An experiment was carried out hydroponically under laboratory conditions to investigate the effect of salt stress on several physiological and biochemical parameters of three sweet corn (Zea mays L. var. saccharata) genotypes: lines 6-13, C-6 (pollen source) and their heterotic F1 hybrid ?Zaharina?. The degree of salinity tolerance among these genotypes was evaluated at three different sodium chloride (NaCl) concentrations: 0 mM, 100 mM, 125 mM and 150 mM. Seed germination, plant growth and biochemical stress determining parameters such as malondialdehyde (MDA), proline content and hydrogen peroxide (H2O2) levels were compared between seedlings of lines and hybrid. The obtained results indicated that both lines and hybrid have similar responses at different salinity levels for all examined traits. All the seedlings? growth parameters, such as germination percentage, root length, shoot length, root and shoot fresh and dry weight, decreased with increasing salinity level. MDA, proline and H2O2 increased at different saline conditions in comparison to the control. Based on the results, of the three genotypes examined, the hybrid Zaharina, followed by line C-6, was more salt-sensitive than line 6-13 in salt stress condition.

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GROWTH AND YIELD RESPONSES OF OPEN POLLINATED MAIZE (Zea mays) TO TYPES AND RATES OF ORGANIC FERTILISERS IN RAINFOREST TRANSITORY AGROECOLOGY OF NIGERIA

Journal of Agricultural Science and Environment ◽

10.51406/jagse.v15i2.1979 ◽

2020 ◽

Vol 15 (2) ◽

pp. 85-94

Author(s):

S. G. ADERIBIGBE ◽

O. S. SAKARIYAWO ◽

A. A. SORETIRE ◽

A. A. OYEKANMI ◽

P. A.S. SOREMI

Keyword(s):

Zea Mays ◽

Leaf Area ◽

Growth Parameters ◽

Field Trials ◽

Growth And Yield ◽

Area Index ◽

Organic Fertiliser ◽

Application Rates ◽

Organic Fertilisers ◽

Yield Responses

Sustainable maize (Zea mays) production in resource challenged regions of the world is achievable among others through optimal utilisation of organic fertilisers at varying rates. Field trials were conducted in Abeokuta (Latitude 7010' N and Longitude 3015' E) in the late cropping season of 2010 and 2011. Three commercially available organic fertilisers [(Gateway 1 (GF1), Gateway 2 (GF2) and Sunshine (SF)], at three rates (0, 10 and 20 t ha-1) and three replicates were used on improved open-pollinated maize variety (Swam 1 yellow). The experiment was laid out in a randomised completely blocked design. GF1 had significantly (P < 0.05) the highest effect on growth parameters (Plant height, stem girth, leaf area and leaf area Index), with SF the least. A significant depression was observed in most growth parameters at increasing application rates of organic fertiliser, a converse pattern was observed on 1000 grain weight (GW), harvest index and cob length. A significantly higher (P < 0.05) vegetative growth, cob weight and grain yield was observed in 2010 than 2011, while 2011 had longer cobs and more 1000 GW than 2010. GF1 was recommended in Rainforest transitory zone of Nigeria at higher application rates though mediated by environmental factors. Keywords: , , ,

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The effect of salt stress on the germination of maize (Zea mays L.) seeds and photosynthetic pigments

Acta agriculturae Slovenica ◽

10.14720/aas.2015.105.1.09 ◽

2015 ◽

Vol 105 (1) ◽

pp. 85-94 ◽

Cited By ~ 12

Author(s):

Sali ALIU ◽

Imer RUSINOVCI ◽

Shukri FETAHU ◽

Bekim GASHI ◽

Emilija SIMEONOVSKA ◽

...

Keyword(s):

Zea Mays ◽

Salt Stress ◽

Photosynthetic Pigments ◽

Zea Mays L

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Low Concentration of Cobalt Increases Growth, Biochemical Constituents, Mineral Status and Yield in Zea Mays

Journal of Scientific Research ◽

10.3329/jsr.v1i1.1226 ◽

2008 ◽

Vol 1 (1) ◽

pp. 128-137 ◽

Cited By ~ 14

Author(s):

Cheruth Abdul Jaleel ◽

Zhao Changxing ◽

K Jayakumar ◽

M Iqbal

Keyword(s):

Zea Mays ◽

Chlorophyll A ◽

Growth Parameters ◽

Growth And Yield ◽

Content Increase ◽

Seedling Vigour ◽

Total Sugars ◽

Chlorophyll Contents ◽

Negative Effect ◽

Maize Plants

A pot culture experiment has been carried out to find the extent of changes occurring in the biochemicals and nutrients of maize plants (Zea mays L.) grown under different concentrations of cobalt (50, 100, 150, 200, 250 mg kg-1 soil). The growth and yield parameters such as seedling vigour, number of cobs, number of seeds per plant; photosynthetic pigments viz., chlorophyll âaâ, chlorophyll âbâ, and total chlorophyll contents; biochemicals like total sugars (reducing and non reducing), starch, amino acids and protein content and various macro- and micronutrients are determined 90 days after sowing (DAS). All the growth parameters, pigment content, biochemicals and mineral content increase at 50 mg Co kg-1 soil when compared with the control. Further increase in the Co levels (100-200 mg kg-1 soil) has a negative effect on all the above parameters.Â Â Keywords: Cobalt; Growth; Zea mays; Biochemicals; Nutrients. Â© 2009 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.Â Â DOI: 10.3329/jsr.v1i1.1226Â

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Biohardening of Arabidopsis thaliana Seeds and Seedlings with Fraser Photinia Associated Bacterium (PGB_invit) in In vitro Conditions

Notulae Botanicae Horti Agrobotanici Cluj-Napoca ◽

10.15835/nbha47311488 ◽

2019 ◽

Vol 47 (3) ◽

pp. 954-961

Author(s):

Maria BATOOL ◽

Özlem AKKAYA ◽

Mine GÜL ŞEKER ◽

Yelda ÖZDEN ÇİFTÇİ

Keyword(s):

Arabidopsis Thaliana ◽

Photosynthetic Pigments ◽

Growth Parameters ◽

Endophytic Bacterium ◽

Dry Weight ◽

Bacterial Populations ◽

Positive Effects ◽

Inactive Form ◽

Potential Possibility

The aim of this study was to analyze possible positive effects of putatively endophytic PGPB (PGB_invit), which was isolated from long-term in vitro cultured fraser photinia microshoots, on seed and 7-day old seedling stages of Arabidopsis thaliana. Seeds and in vitro-germinated seedlings were inoculated with 107 CFU/mL and 108 CFU/mL active (A) and inactive (I) endophytic bacterial populations along with their mix compositions (A+I) and suspended in MPYE broth together with their controls (untreated ones). 14 days old seedlings were evaluated for various plant growth parameters [i.e., shoot and root fresh weight (FW), shoot length (SL), shoot and root dry weight (DW), root length (RL) and photosynthetic pigments including chlorophyll a, b and carotenoids of plantlets] as well as endophytic and rhizospheric trait of bacteria. Positive effects of inactive and active bacterium on FW, DW and photosynthetic pigments for 7-day inoculated seedlings were recorded whereas an increase in photosynthetic contents for seed stage inoculations was observed. Rhizospheric and endophytic colonization of the bacteria was confirmed by PCR with the presence of virD1 gene, which is previously recorded to be existed in the plasmid of bacterium after inoculation. Overall, these results demonstrated that this peculiar putative endophytic bacterium being beneficial in active and even more useful in inactive form for A. thaliana when optimum conditions and concentrations are used. Moreover, presence of virD1 gene suggested its potential possibility to be used in bioengineering along with various other beneficial PGPR features as biofertilizer.

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