Accelerated Ageing Test in Maize: Pattern of Seed Deterioration

The freshly harvested seeds of maize single cross hybrid TNAU maize hybrid CO 6 were kept under accelerated ageing condition by exposing the seeds to 40°C temperature and 100 per cent relative humidity in order to assess the physical, physiological and biochemical changes taking place during storage. This study revealed that minimum germination of 90 per cent as per the Indian Minimum Seed Certification Standards (IMSCS) was reached on 4th day of accelerated ageing and reached 54 percent on 9th day of accelerated ageing against the initial seed germination of 98 per cent. The moisture content was increased from 10.1 per cent to 15.9 per cent on 9th day of accelerated ageing. The root length, shoot length, dry matter production, vigour index, α-amylase, catalase, peroxidase activity and carbohydrate content were decreased. Whereas electrical conductivity of seed leachate and reducing sugars were increased, while advancing the period of accelerated ageing.

Download Full-text

Influence of size grading on physiological parameters in Tephrosia (Tephrosia purpurea) MDU (KO)-1

Journal of Applied and Natural Science ◽

10.31018/jans.v9i1.1244 ◽

2017 ◽

Vol 9 (1) ◽

pp. 639-641

Author(s):

S. Sivasubramaniam ◽

S. Ambika ◽

M. Vetrivel

Keyword(s):

Seed Weight ◽

Dry Matter ◽

Seed Quality ◽

Shoot Length ◽

Crop Establishment ◽

Tephrosia Purpurea ◽

Matter Production ◽

Vigour Index ◽

Physiological And Biochemical ◽

100 Seed Weight

Seed grading is an important practice for better crop establishment and to improve efficiency of planting ratio in field and also useful in separation of quality seed in a seed lot. The influence of seed size on physiological and biochemical seed quality characters were evaluated in Tephrosia seeds using seeds retained on 5.5/64″, 6/64″ and 7/64″ sieves along with control. The estimations revealed that larger size seeds retained on 7/64" sieves recorded the maximum recovery (64 %), 100 seed weight (2.0 g), speed of germination (14.1) germination ( 86 %), root length (8.5 cm), shoot length (11.0 cm), dry matter production (15.92 mg seedlings-10), vigour index (1677) and protein (10.56 %) compared to BSS 5.5 / 64'', BSS 6 / 64'' and ungraded seeds.

Download Full-text

Seed quality improvement with fruit extracts in blackgram

Journal of Phytology ◽

10.25081/jp.2019.v11.3785 ◽

2019 ◽

pp. 16-20

Author(s):

Poovarasan T ◽

Lakshmi S ◽

Renugadevi J ◽

Senthil A

Keyword(s):

Seed Quality ◽

Germination Percentage ◽

Quality Parameters ◽

Pomegranate Peel ◽

Matter Production ◽

Seedling Length ◽

Enormous Amount ◽

Vigour Index ◽

And Control ◽

Physiological And Biochemical

The present study was conducted to know the effect of extracts from parts of papaya and pomegranate fruits containing enormous amount of antioxidants on the seed quality parameters of blackgram (Vigna mungo L.). Blackgram seeds were soaked in papaya peel, pulp, seeds and pomegranate peel, seeds extracts viz., 2.5 %, 5 %, 7.5 % and 10 % concentration for 1 hour. The physiological parameters were evaluated under laboratory conditions. The results revealed that seeds treated with 2.5 % papaya seed extract recorded high physiological and biochemical changes in terms of field emergence, germination percentage, seedling length, dry matter production, vigour index and ?- amylase activity when compared to rest of treatments and control.

Download Full-text

Physiological and biochemical responses of “mofumbo” seeds during storage

Journal of Seed Science ◽

10.1590/2317-1545v43254079 ◽

2021 ◽

Vol 43 ◽

Author(s):

Bruno Silva Guirra ◽

Caio César Pereira Leal ◽

Keylan Silva Guirra ◽

Tatianne Raianne Costa Alves ◽

Salvador Barros Torres ◽

...

Keyword(s):

Amino Acids ◽

Natural Environment ◽

Reducing Sugars ◽

Neutral Lipids ◽

Dry Mass ◽

Storage Conditions ◽

Combretum Leprosum ◽

Total Free Amino Acids ◽

Controlled Environments ◽

Physiological And Biochemical

Abstract: “Mofumbo” (Combretum leprosum Mart. (Combretaceae) is a neotropical species of wood, pharmacological, beekeeping and environmental importance. Thus, the objective was to evaluate the biochemical and physiological responses in C. leprosum seeds under different storage environments. The experiment was carried out in a factorial (2 x 7), with two storage conditions (natural and climate-controlled environments) and seven storage periods (0; 60; 120; 180; 240; 300 and 360 days), in four replications per treatment. At the beginning of storage and at 60-day intervals, the seeds were analyzed for water content, physiological potential (germination, germination speed index, root and shoot lengths and seedling dry mass) and biochemical (neutral lipids, lipid peroxidation, total and reducing sugars, total free amino acids, and starch). The results indicated that storing “mofumbo” seeds for 360 days reduced viability, being more pronounced after 180 days, regardless of the storage environment. “Mofumbo” seeds were stored in a natural environment for 180 days, resulting in less lipid degradation. After this period, the reduction was associated with the attack of reducing sugars on amino acids. Thus, it is concluded that “mofumbo” seeds must be stored in a natural environment for up to 180 days.

Download Full-text

Multivariate analysis of sesame genotypes under saline stress

Indian Journal of Agricultural Research ◽

10.18805/ijare.a-5080 ◽

2018 ◽

Author(s):

B. Priyadharshini, ◽

M. Prakash ◽

M. Vignesh ◽

S. Murugan ◽

R. Anandan

Keyword(s):

Multivariate Analysis ◽

Dry Matter ◽

Germination Percentage ◽

Sesame Oil ◽

Saline Stress ◽

Matter Production ◽

Seedling Length ◽

Resistance To Oxidation ◽

Vigour Index ◽

Sesame Genotypes

Sesame is notable for its rich antioxidants and sesame oil is also familiar for its resistance to oxidation. The cultivation of sesame is usually restricted under abiotic stress conditions. Hence in order to study the performance of sesame genotypes to saline stress, an experiment was conducted to screen ten ruling varieties of sesame viz., CO1, SVR1, SVPR1, VRI 1, VRI 2, TMV 3, TMV 4, TMV 5, TMV 6 and TMV 7 at five different EC levels (EC 1, 2, 3, 4 and 5). Seedling observations namely, germination percentage, speed of germination, shoot length, root length and dry matter production were recorded. Among the genotypes, it was found that under higher saline conditions (EC5), VRI 1 recorded higher seedling length (2.0 cm), vigour index I (100) and vigour index II (1.15), whereas under normal condition, TMV 4 and CO 1 performed better. In general, there was a decrease in all the seedling parameters with increased levels of salinity. With STAR software, Multivariate analysis was done and on the basis of dendrogram, five clusters were formed and the cophenotic correlation co- efficient was found highest in Control (0.912) followed by EC 2 ( 0.829).

Download Full-text

Plants population and harvesting times influence in saccharine sorghum BRS 506 production

Revista Agrogeoambiental ◽

10.18406/2316-1817v9n420171011 ◽

2018 ◽

Vol 9 (4) ◽

Author(s):

Ivan Vilela Andrade Fiorini ◽

Renzo Garcia Von Pinho ◽

Hélcio Duarte Pereira ◽

João Paulo Martins Moraes ◽

Jhonathan Pedroso Rigal dos Santos ◽

...

Keyword(s):

Sweet Sorghum ◽

Dry Matter ◽

Linear Growth ◽

Reducing Sugars ◽

Soluble Solids ◽

Matter Production ◽

Fodder Production ◽

Green Matter ◽

Total Reducing Sugars ◽

Dry Matter Weight

Saccharine sorghum is an excellent option for ethanol production under industrial and agronomic perspectives, due to high green matter production and succulent stalks with fermentable sugars. The aim of this work was to evaluate the harvesting season and plants population effect over theethanol and fodder production from sweet sorghum culture BRS 506. The experiment was installed in November 2012, at (CDTCA/UFLA), located in Lavras (MG). The experimental design was in randomized blocks, with 3 repetitions, factorial scheme 4 x 4 (4 populations: 70, 100, 130 and 160thousand plants ha-1 ; 4 harvesting seasons: flowering (0 days after flowering (DAF), 10 DAF, 20 DAF and physiological maturity at 40 DAF). The variables evaluated at harvesting: green matter weight (GM), dry matter weight (DM), juice volume (JV), total soluble solids (ºbrix), total reducing sugars (TRS) and brix tonnes per hectare (TBH). The populations increase provided the highest JV and it has not affected other variables. The characteristics were influenced by the harvesting seasons. The harvesting season at 40 DAF provided the highest ºbrix. The ºbrix and the TRS showed linear growth with an increase after flowering for plants harvesting. The highest productivities (GM, DM, JV and TBH) were obtained close to 17, 22, 17 and 14 DAF, respectively, favoring higher fodder and ethanolproduction in these stages.

Download Full-text

Physiological and biochemical changes in young maize plants under iron deficiency: 2. Catalase, peroxidase, and nitrate reductase activities in leaves

Journal of Plant Nutrition ◽

10.1080/01904169509365046 ◽

1995 ◽

Vol 18 (10) ◽

pp. 2081-2091 ◽

Cited By ~ 14

Author(s):

V. Nenova ◽

I. Stoyano

Keyword(s):

Iron Deficiency ◽

Nitrate Reductase ◽

Biochemical Changes ◽

Catalase Peroxidase ◽

Maize Plants ◽

Physiological And Biochemical

Download Full-text

Physiological and biochemical responses of barley to application of bio-fertilizers and nano iron oxide under salinity stress in greenhouse

Bangladesh Journal of Botany ◽

10.3329/bjb.v47i4.47364 ◽

2018 ◽

Vol 47 (4) ◽

pp. 863-875

Author(s):

Siyamak Dadashzadeh ◽

Raouf Seyed Shariff ◽

Salim Farzaneh

Keyword(s):

Electrical Conductivity ◽

Iron Oxide ◽

Grain Yield ◽

Salinity Stress ◽

Soluble Sugars ◽

Fertilizer Application ◽

Relative Water ◽

Catalase Peroxidase ◽

Four Levels ◽

Physiological And Biochemical

To study the effects of bio-fertilizers and nano iron oxide on some physiological and biochemical traits of barley under salinity stress, a factorial experiment was conducted based on RCBD with three replications under greenhouse condition. Factors in the study, included four levels of salinity, four levels of nano iron oxide use and four preparations of bio-fertilizer application. Increasing salinity in the soil decreased chlorophyll content, quantum yield, relative water content and grain yield, whereas soluble sugars, proline content, electrical conductivity and the activities of catalase, peroxidase and polyphenol oxidase enzymes increased. Inoculation of plants with bio-fertilizers and nano iron oxide application improved these traits (except electrical conductivity) under salinity as well as normal conditions. Results showed that application of Azospirillum and mycorrhiza and 0.9 g/l nano iron oxide (B3Fe3) increased about 15.45% from grain yield in comparison with B4Fe4 under the highest salinity level. Based on the results, it seems that bio-fertilizers and nano iron oxide application can be useful in alleviating salinity stress in barley.

Download Full-text

Physiological and biochemical changes during desiccation tolerance loss in millet (Pennisetum glaucum L.) seeds

Acta Scientiarum Agronomy ◽

10.4025/actasciagron.v41i1.36522 ◽

2019 ◽

Vol 41 (1) ◽

pp. 36522

Author(s):

Joana Souza Fernandes ◽

Renato Mendes Guimarães ◽

Jose Marcio Rocha Faria ◽

Diego De Sousa Pereira ◽

Stefania Vilas Boas Coelho ◽

...

Keyword(s):

Desiccation Tolerance ◽

Pennisetum Glaucum ◽

Seed Vigor ◽

Biochemical Changes ◽

Heat Resistant ◽

Randomized Design ◽

Enzymatic Systems ◽

Physiological Quality ◽

Catalase Peroxidase ◽

Physiological And Biochemical

The aim of this study was to evaluate the physiological and biochemical changes related to the loss of desiccation tolerance in millet seeds. The points studied were determined according to the seed imbibition curve of the hybrid ADRF6010: control (0 h), 3 h, 1 and 3 mm of radicle. The seeds were dried on silica gel for 72 h at 20 °C, followed by pre-humidification at 25 °C for 24 h. The physiological quality was evaluated by the electrical conductivity and germination test, and the seed vigor through the first count and germination speed index. The experiment was performed in a completely randomized design and means were compared by the Scott-knott test at 5% probability. The enzymatic systems evaluated were: superoxide dismutase, catalase, peroxidase, and α-amylase, and the expression of heat-resistant proteins. The enzymatic activity was quantified through the software ImageJ®. Millet seeds lost desiccation tolerance when the radicle reaches 1 mm of length. According to the enzymatic standards, the enzymes peroxidase and α-amylase, as well as the activity of heat-resistant proteins are related to the loss of desiccation tolerance in millet seeds.

Download Full-text