Longevity of maize seed (Zea mays L.) under different storage conditions

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Nagwa Shalaby ◽  
Alaa Shahein
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Storage Conditions ◽  
Maize Seed

scholarly journals Penggunaan Desikan Abu Dan Lama Simpan Terhadap Kualitas Benih Jagung (Zea mays L.) Pada Penyimpanan Ruang Terbuka

Agrologia ◽  
2018 ◽  
Vol 1 (1) ◽  
Author(s):  
M. K Lesilolo ◽  
Jacob Patty ◽  
N. Tetty
Keyword(s):  
Zea Mays ◽  
Water Content ◽  
Seed Weight ◽  
Zea Mays L ◽  
Growth Speed ◽  
Maize Seed ◽  
Seed Growth ◽  
Two Factors ◽  
Result Show ◽  
Growth Vigor

This study was aimed to determine the proper dose of ash desiccant on maize seed stored for 30, 60 and 90 days. The design used was a Completely Randomized Factorial Design, with two factors and three replications.  The first factor was desiccant dose (D) : Do = 0 % (control), D1 = 5 % (12.5 g of seed weight), D2 = 10% (25 g of seed weight), D3 = 15 % (37 g of seed weight), D4 = 20 % (50 %g of seed weight), D5 = 25 % (62.5 g of seed weight).  The second factor was length of storage (S) : S1 = 30 day storage, S2 = 60 day storage and S3 = 90 day storage. The result show that use of desiccant only gave effect on the water content of seeds (12.31 %) and speed of seed growth vigor parameters (24.84 %).  Use of desiccant in 90 day storage were able to maintain water content of seeds (12.43 %), seed germination viability parameter (100 %), and vigor of seeds, which consisted of seed growth simultaneity (66.77 %) and seed growth speed (28.71 %).  The interaction between the use off ash desiccant and the length of storage had no effect on  viability and vigor of maize (Zea mays L) seeds but had an effect on their water content after storage (12.73%).

scholarly journals Spermidine Suppressed the Inhibitory Effects of Polyamines Inhibitors Combination in Maize (Zea mays L.) Seedlings under Chilling Stress

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2421
Author(s):  
Canhong Gao ◽  
Mohamed S. Sheteiwy ◽  
Chen Lin ◽  
Yajing Guan ◽  
Zaid Ulhassan ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Chilling Stress ◽  
Inbred Lines ◽  
Inhibitory Effects ◽  
Maize Seed ◽  
Adenosylmethionine Decarboxylase ◽  
Combination Treatments ◽  
Significant Difference ◽  
Different Doses

Chilling stress greatly inhibited the seed germination, plant growth, development and productivity in this study. The current research aimed to study the effects of different polyamine (PA) inhibitor combinations (Co), e.g., D-arginine (D-Arg), difluoromethylormithine (DFMO), aminoguanidine (Ag) and methylglyoxyl–bis-(guanyhydrazone) (MGBG) at different doses, i.e., 10 µM Co, 100 µM Co, 500 µM Co, 1000 µM Co and 1000 µM Co + 1 mM Spd (Spermidine) in two inbred lines of maize (Zea mays L.), i.e., Mo17 and Huang C, a sensitive and tolerant chilling stress, respectively. The combination treatments of PA inhibitors reduced the biosynthesis of putrescine (Put) in the tissues of both studied inbred lines. Application with 500 µM Co and 1000 µM Co did not result in a significant difference in Put concentrations, except in the coleoptile of Mo17. However, combining Spd to 1000 μM of PA inhibitors enhanced the Put, Spd, spermine (Spm) and total PAs in the roots, coleoptile and mesocotyls. Put and total PAs were increased by 39.7% and 30.54%, respectively, when Spd + 1000 µM Co were applied relative to their controls. Chilling stress and PA inhibitors treatments affected both inbred lines and resulted in differences in the PA contents. Results showed that enzymes involved in the biosynthesis of PAs (ornithine decarboxylase as ODC and S-adenosylmethionine decarboxylase as SAMDC) were significantly downregulated by 1000 µM Co in the tissues of both inbred lines. In contrast, the activity of PAO, a Pas degradation enzyme, was significantly improved by 1000 µM Co under chilling stress. However, Spd + 1000 µM Co significantly improved the activities of ODC and SAMDC and their transcript levels (ODC and SAMDC2). While it significantly downregulated the PAO activity and their relative genes (PAO1, PAO2 and PAO3) under chilling stress. Overall, this study elucidates the specific roles of Spd on the pathway of PA inhibitors and PA biosynthesis metabolism in maize seed development in response to chilling stress. Moreover, the Huang C inbred line was more tolerant than Mo17, which was reflected by higher activities of PA biosynthesis-related enzymes and lower activities of PAs’ degradative-related enzymes in Huang C.

scholarly journals Engineering solutions applied to pneumatic drills to reduce losses of dust from dressed seeds

2013 ◽  
Vol 44 (2s) ◽  
Author(s):  
D. Pochi ◽  
M. Biocca ◽  
G. Brannetti ◽  
R. Fanigliulo ◽  
P. Gallo ◽  
...  
Keyword(s):  
Zea Mays ◽  
Fixed Point ◽  
Zea Mays L ◽  
Constant Pressure ◽  
Ground Level ◽  
Test Results ◽  
Maize Seed ◽  
Plastic Container ◽  
Electrostatic Filter ◽  
Seed Distribution

Neonicotinoid insecticides (imidacloprid, clothianidin, thiamethoxam) and fipronil for maize (Zea mays L.) seed dressing have been claimed to play a role in honey bee (Apis mellifera L.) decline, since pneumatic precision drills used for sowing contribute to the dispersion of the abrasion dust produced by dressed seeds. The active ingredients (a.i.) can contaminate the environment and can lead to the exposure of operators and bystanders during sowing operations. To achieve a significant reduction of dust drift and to enhance the safety for the operators, CRA-ING studied and developed novel engineering solutions applicable to drills, based on an air-recycling/filtering system. In the first system, the air’s excess is forced outward through suitable filters placed on the modified lid of the seed hopper. It can be easily applied to commercial drills in use. The second system was specifically designed for new drills. It consists of a collector duct that receives the air expelled from the vacuum fan opening, creating constant pressure conditions. Part of the air is recycled into the seed hoppers, as the air in excess is directed outward through a single main filter. A third system, based on the second one, entails the use of an electrostatic filter to improve its efficiency. Moreover, to avoid the operator’s exposure to the dust during the seed loading, we show an integrated solution based on the use of a modified pre-charged plastic container that replace the drill’s hoppers. Preliminary tests ascertained the regular seed distribution with the drills equipped with the prototypes. Then, trials were carried out at fixed point and in field, for detecting the amounts of the drifted a.i., using commercial maize seed dressed with thiamethoxam, imidacloprid, clothianidin and fipronil. The test results show powder and a.i. drift reductions up to a maximum of 94.5% measured at ground level (with fipronil as a.i.) as a consequence of the use of the prototypes.

scholarly journals Effect of Artificial Detasseling and Defoliation on Maize Seed Production

2019 ◽  
pp. 1-9 ◽  
Author(s):  
Marcio Paulo Czepak ◽  
Marcio Kliemann ◽  
Omar Schmildt ◽  
Rubens Neres Araujo ◽  
Vinicius de Souza Oliveira ◽  
...  
Keyword(s):  
Zea Mays ◽  
Seed Production ◽  
Zea Mays L ◽  
Block Design ◽  
Maize Seed ◽  
Hybrid Corn ◽  
Central Lines ◽  
Randomized Complete Block Design ◽  
Set Up

The objective of this work was to evaluate the effect of artificial detasseling and defoliation on the production of Pioneer 30F90 simple hybrid corn (Zea mays L.) seeds. The experiment was set up in a randomized complete block design, consisting of seven treatments (Control; detasseling; detasseling + defoliation of the top leaf; detasseling + defoliation of the two upper leaves; detasseling + defoliation of the three upper leaves; detasseling + defoliation of the upper four leaves; detasseling + defoliation of the upper five leaves), with 4 replicates. The plots were composed of 6 spaced rows of 0.90 cm by 6.00 m in length. At the time of the issue of 50% of the tassel were carried out the treatments. For the evaluations the two central lines of each plot were collected, eliminating 1.00 m from each end, totaling a useful area of 7.2 m². At harvest, the crop presented a final stand of 5 plants m² (50000 ha-1). According to the results obtained, it was concluded that the detasseling positively influenced the production components, due to the decrease of the auto-shading. The higher the level of defoliation, the lower the active photosynthetic area of the plant, and consequently the lower the productivity. The most affected production components in defoliation are grain numbers in the row, grain numbers in the ear and weight of 1000 grains. detasseling and defoliation do not interfere with the germination of corn seeds.

scholarly journals AKIBAT PEMANGKASAN TASEL DAN DAUN DI BAWAH TONGKOL TERHADAP PRODUKSI BIJI JAGUNG ( Zea mays, L )

2018 ◽  
Author(s):  
surtinah
Keyword(s):  
Zea Mays ◽  
Seed Production ◽  
Zea Mays L ◽  
Block Design ◽  
Maize Seed ◽  
Maize Crop ◽  
Random Block ◽  
Production Research ◽  
Random Block Design

Seed maized have ability in piling up dry materials, but process thatdepended from result of photosynthesis conducted by leaf at the time of growth ofvegetative and also at the time of generative growth, its problem do tasel also playa part in conglomeration of dry materials to seed. Object of this research is to getmost precise maize crop organ clipping and give best maize seed production. Research conducted by using random block design in factorial; first factoris pruning of tasel which consist of 2 level that is clipped and do not be clipped.Second factor is leaf pruning under cob which consist of 3 level that is withoutprunned, pruning 3 piece of leaf, and pruning entire leaf. Continued test usedDNMRT at level 5 % parameter perceived is dry wight of cob / crop (g), weigh ofpipilan dry / crop (G). and wight 100 seed of pipilan dry / crop (g). Result of research indicated that pruning of tasel can improve dry wight ofcob / crop, weight of pipilan dry / crop, and wight 100 seed of pipilan dry

Excess Boron Reduces Polyphenol Oxidase Activities in Embryo and Endosperm of Maize Seed during Germination

2007 ◽  
Vol 62 (1-2) ◽  
pp. 111-115 ◽  
Author(s):  
Hülya Ölçer ◽  
İsmail Kocaçalışkan
Keyword(s):  
Zea Mays ◽  
Boric Acid ◽  
Caffeic Acid ◽  
Polyphenol Oxidase ◽  
Zea Mays L ◽  
Germination Percentage ◽  
Distilled Water ◽  
Maize Seed ◽  
Maize Seeds

The effects of increasing concentrations of boron (0, 0.1, 1, 10 and 20 mм) as boric acid on the rate of germination and polyphenol oxidase activities in embryo and endosperm tissues of maize seeds (Zea mays L. cv. Arifiye) were studied. The germination percentage of maize seeds was not affected by boron concentrations up to 10 mм, and decreased by 20 mм. Distilled water and lower boron concentrations (0.1 and 1 mм) increased polyphenol oxidase activities at the beginning of germination up to 12 h whereas its excess levels (10 and 20 mм) decreased polyphenol oxidase activities in embryos and endosperm during germination. Polyphenol oxidase activities with o-diphenolic substrates (caffeic acid, catechol and dopa) were found to be higher than with a monophenolic substrat (tyrosine) in both embryos and endosperms. Further, caffeic acid oxidizing polyphenol oxidase was found to show more activity in embryos of the seeds germinating in distilled water when compared to other substrates.

Influence de l'âge sur les caractéristiques photosynthétiques de la feuille de maïs, Zea mays L

Agronomie ◽  
1982 ◽  
Vol 2 (2) ◽  
pp. 159-166 ◽  
Author(s):  
Olivier BETHENOD ◽  
Christine JACOB ◽  
Jean-Claude RODE ◽  
Jean-François MOROT-GAUDRY
Keyword(s):  
Zea Mays ◽  
Zea Mays L

PRODUKTIVITAS PUPUK ORGANIK TERHADAP HASIL TANAMAN JAGUNG (Zea mays L) DI TANAH MINERAL

1970 ◽  
Vol 3 (2) ◽  
pp. 318-326
Author(s):  
Yoyon Riono.
Keyword(s):  
Zea Mays ◽  
Zea Mays L

Penelitian tentang pengaruh pemberian produktivitas pupuk organik terhadap hasil Tanaman Jagung (Zea mays L) di tanah mineral penelitian ini di laksanakan pada bulan Februari sampai Mei, yang bertempat di Sungai Salak Kecsmstsn Tempuling Kabupaten Indragiri Hilir Provinsi Riau. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) yang disusun secara faktorial yang terdiri dari 2 faktor dan 3 ulangan. Faktor B adalah bokashi pupuk kandang yang terdiri dari 4 taraf yaitu B0 (tanpa pemberianpupuk kandang), B1 (5 ton/ha) dan B2 (10 tom/ ha), serta B3 (15 ton/ha) Parameter yang di amati adalah tinggi tanaman, panjang daun ke tujuh, berat brangkasan basah, berat berangkasan kering, berat tongkol pertanaman sampel, diameter tongkol , produksi per plot, dan berat 100 biji. Selanjutnya data yang di peroleh di olah secara statistik, apabila F hitung lebih besar dari F tabel di lanjutkan dengan uji lanjut Tukey HSD pada taraf 5%. Hasil penelitian menunjukan bahwa interaksi bokashi pupuk kandang dan varietas berpengaruh nyata terhadap berat tongkol dan produksi dan produksi per plot, akan tetapi tidak berpengaruh nyata terhadap tinggi tanaman, panjang daun ke tujuh, berat brangkasan basah, berat brangkasan kering , diameter tongkol dan berat 1000 biji. Untuk perlakuan bokashi pupuk kandang secara tunggal berpengaruh nyata terhadap terhadap diameter tongkol , akan tetapi tidak berpengaruh nyata terhadap tinggi tanaman, panjang daun ke tujuh, berat brangkasan basah, berat brangkasan kering, berat tongkol, produksi per plot, dan berat 1000 biji, perlakuan bokashi terbaik terdapat pada pemberian 15 ton/ha. Sedangkan perlakuan varietas secara tunggal berpengaruh nyata terhadap berat brangkasan basah, berat tongkol, dan produksi per plot seta berat 1000 biji, akan tetapi tidak berbeda nyata dengan tinggi tanaman, panjang daun ke tujuh, berat brangkasan kering, dan diameter tongkol. Varietass terbaik adalah NT 10

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