Variation in relative water content, proline accumulation and stress gene expression in two cowpea landraces under drought.

Starch accumulation in rice grains subjected to drought during grain filling stage.

https://repositorium.sdum.uminho.pt/bitstream/1822/73138/1/2019Carvalho.pdf

Evaluating stress responses in cowpea under drought stress.

Drought is a major environmental stress that limits faba bean growth, leading to considerable reduction in their productivity. Two genotypes (Giza 3 and Hara) were evaluated under three water treatments (90%, 60% and 30% field capacity). The results showed that water stress affects negatively chlorophyll fluorescence parameters at different levels of water deficit and the variations of Fv/Fm, ΦPSII and electron transport rate in Giza 3 were largely higher than those in Hara. Drought preferentially enhanced the activities of superoxide dismutase, catalase and guaiacol peroxidase whereas it did not affect ascorbate peroxidase activity. Real-time reverse transcriptase-polymerase chain reaction results demonstrated that the expression of aquaporin (PIP), myeloblastosis (MYB), nine-cis-epoxycarotenoid dioxygenase, late embryogenesis abundant, dehydrins (Dhn), heat shock protein (HSP) and APETALA2/ethylene-responsive factor was modified in response to drought conditions and that all genes were different...

Effect of drought stress on chlorophyll fluorescence, antioxidant enzyme activities and gene expression patterns in faba bean (Vicia faba L.)

Regulation of phytosterol biosynthetic pathway during drought stress in rice.

This Experiment was carried out in the screen house of the International Institute of Tropical Agriculture (IITA) Kano station to study the leaf relative water content and yield of nine cowpea (Vigna unguiculata (L) Walp.) varieties to water stress. Data were collected on the following criteria, number of leaves, leaf area (LA), leaf relative water content (LRWC), and agronomic traits. The experimental materials were arranged in randomize complete block design with three treatments which include unstressed, vegetative stage and flowering stage of water stress. The results indicate that Leaf Relative Water Content (LRWC) of the water stressed genotypes were lower than the unstressed genotypes. At vegetative stage of water stress only 22.22% had an increase in their leaf water content and 77.78% recorded reduction in their LRWC. The highest reduction was exhibited by IT97K568-19 with 9.5% and lowest reduction was recorded 0.1% by TVU-7778. 55.55% of the genotypes at flowering stage of water stress had reduction in their pod number. The Fodder yield at vegetative stage of water stress showed that 77.77% of the genotypes recorded reduction in their Fodder yield. IT98K-503-1 had higher dry fodder yield with 4.07% increase. At flowering stage of water stress, 99% of the genotypes recorded reduction in their fodder yield. The present study conclude that, water stress reduced the leaf area, relative water content and grain yield, among the cowpea screen genotypes TVU-7778 and IT98Kk-503-1recorded lower seed number at vegetative and flowering stages

/pdf/effect-of-water-stress-on-the-leaf-relative-water-content-2qcgy1gutw.pdf

Effect Of Water Stress On The Leaf Relative Water Content And Yield Of Some Cowpea (Vigna Unguiculata (L) Walp.) Genotype

Drought is an abiotic stress that affects the growth of cowpea genotypes in Sub-saharan Africa One of the first physiological responses to water stress in crops is the functioning of the leaf. The aim of the present study is to determine leaf physiological responses of cowpea to water stress. The study was conducted at International Institute of Agriculture (IITA) Kano state, Nigeria during the period of 17th November to 23rd December 2009. Seven cowpea genotypes differing in drought resistance were evaluated. The experiment was laid out in randomized complete design with three treatment regime, which include unstressed (control), moderate and severe water stress condition. The criteria measured include, Chlorophyll fluorescence parameters, chlorophyll content (SPAD), Water Use Efficiency (WUE) specific leaf area (SLA), shoot and root biomass. The results showed that water stress significantly reduced chlorophyll content (SPAD). 100% reduction was recorded in moderate and severe water stress. The results of photochemical yield (Fv/Fm) indicated that 71% of the genotypes at severe stress had reduction in Fv/Fm, while 42% was recorded in moderate stress. Genotype IT98K-555-1 recorded the highest reduction in Fv/Fm. The result showed a positive correlation between photochemical yield and chlorophyll content (SPAD) at unstressed (r= 0.921), moderate (r=0.903) and severe (r= 0.861) at 5%. Water stress significantly reduced above ground biomass. Lower biomass was recorded more under severe water stress. Reductions in shoot biomass were more significant in IT0K-835-45 and IT98K-555-1. At severe water stress, most of the genotypes recorded lower water use efficiency, except in genotype IT00K-901-5. The results showed a general increase in root biomass in moderate and severe water stress condition, except in IT00K-835-45 and IT96D-610. Increases in the root biomass were recorded more under moderate stress. Keywords: Water stress, Water Use Efficiency, Leaf physiology, Drought Resistance, Cowpea ( Vigna unguiculata (L.) walp)

/pdf/physiological-responses-of-some-drought-resistant-cowpea-gwp7u4medm.pdf

Physiological Responses of Some Drought Resistant Cowpea Genotypes ( Vigna unguiculata (L.) Walp) to Water Stress

Cowpea production in the Sahelian region faced production constraint due to disease and drought Striga gesnerioides is a major constraint to cowpea production specifically to the agronomic point of view The aim of this present study is to determine the effect of Striga gesnerioides on the growth and yield of some cowpea genotypes subjected to different moisture stress conditions The experiment was conducted at screen house of the International Institute of Tropical Agriculture (IITA) Kano, Nigeria Three cowpea varieties were used in the experiment, the experimental set up was completely randomized design with four treatment regimes; T1, vegetative stage of water stress with Striga infestation; T2, vegetative stage of water stress; T3, unstressed with Striga infestation and T4, unstressed Uniform broadcasting of 005g of Striga gesnerioides were imposed in the treatment Data were collected on plant height, number of leaves, plant vigor score, phenology, and grain yield The results showed that there is a significant difference in the number of leaves between the treatments with DANILA having the highest number of leaves DANILA was found to exhibit the highest plant vigor Total chlorophyll reductions were recorded at 37 days after water stress and striga infestationDANILA recorded the highest reduction in total chlorophyll content The results showed that IT98K-205-8 matured earlier and recorded higher yield, Danila recorded low yield It can be concluded that cowpea varieties IT97K-499-35 and IT98K-205-8 which gave the highest yield were resistance to Striga gesnerioides, whereas Danila which developed Symptoms with reduced yield is said to be susceptible to Striga gesnerioides  Keyword: Striga gesnerioides , cowpea, water stress

/pdf/effects-of-striga-gesnerioides-on-the-growth-and-yield-of-37xorf7tj8.pdf

Effects of Striga gesnerioides on the Growth and Yield of Some Cowpea ( Vigna unguiculata (L.) Walp) Genotypes under Water Stress Condition

Experiment was carried out at International Institute for Tropical Agriculture (IITA), Kano, Nigeria. The aim of the study was to evaluate the effect of different levels of Striga infestation on the growth and yield of some varieties of cowpea. Four cowpea genotypes were selected for the study. The experiment was laid out in randomized complete block design with two treatment regimes of Striga  infestation. The levels of Striga infestation include 0.05g, 0.1g and 0.0g (control). The results showed that IT97K-499-35 recorded higher plant height at 0.5g and 0.1g of Striga infestation, but DANILA showed lower plant height at 0.1g of Striga infestation. The result for chlorophyll content (SPAD) indicates that at 30 days after Striga infestation, IT99K-241-2 recorded higher chlorophyll SPAD value of 39.2. But IT97K-499-35 had lower chlorophyll SPAD value of 16.3. Higher number of days to 50% flowering was recorded in IT99K-241-2 across the treatment. IT98K-205-8 recorded early days to 50% flowering across the treatment. IT99K-241-2 and DANILA recorded Striga emergence and attachment to their roots. But IT97K-499-35 and IT98K-205-8 had no Striga attachment and emerged. Higher grain yield was recorded in IT97K-499-35, but IT99K-241-2 and DANILA recorded lower grain yield. Higher Fodder yield was recorded in DANILA. The result indicates that fodder yield was reduced in 0.5g and 0.1g of Striga infestation in all the varieties. The present study conclude that varieties IT99K-241- 2 and DANILA were susceptible to Striga at 0.1g of infestation, while IT97K-499-35 was tolerant to  Striga at 0.5 and 0.1g of Striga infestation. Keyword : Striga gesnerioides , Cowpea, growth and Yield

/pdf/effect-of-different-levels-of-striga-gesnerioides-on-the-2kxi5c8rce.pdf

Effect of different levels of Striga gesnerioides on the growth and yield of some local and improved cowpea ( Vigna unguiculata (L) Walp) varieties

Birth registration is a fundamental step towards good governance and a vital element in the fostering of democratic processes. Not only does the process of registration allow effective administration and bring children to the notice of decision-makers, it is the official and positive recognition of a new member of society, who is entitled to all the rights and responsibilities of a valued citizen. The present method of processing and issuance of birth certificate has over the years in Kaduna North local government(LG) and medical centers been associated with certain weakness which may include wrong entry of child’s data, misplacement of entries record, time wastage and also open door for people to forge certificate and claim to be members of another society. However, with the emergence of digital identity as the preferred method of providing citizens with access to officially-recognized identification, this study will exploits the functionality of computer system, software applications and the internet technology to proposed a system for centralizing, capturing of child data, processing, securing as well as speeding-up the issuance of birth certificate in Kaduna North (LG). Consequently, the proposed system provides an accurate digital platform for entering and saving of child’s data in a secure database as well as the timely issuance of birth certificate.

/pdf/centralized-birth-registration-and-citizen-information-29d09b898r.pdf

M. Hayatu

Papers

Effect Of Water Stress On The Leaf Relative Water Content And Yield Of Some Cowpea (Vigna Unguiculata (L) Walp.) Genotype

Physiological Responses of Some Drought Resistant Cowpea Genotypes ( Vigna unguiculata (L.) Walp) to Water Stress

Effects of Striga gesnerioides on the Growth and Yield of Some Cowpea ( Vigna unguiculata (L.) Walp) Genotypes under Water Stress Condition

Effect of different levels of Striga gesnerioides on the growth and yield of some local and improved cowpea ( Vigna unguiculata (L) Walp) varieties

Centralized birth registration and citizen information system - a study of kaduna north local government