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Studies on the Anatomy of the Mature Bark and Fungal Degradation of the Wood of Para-Rubber, Hevea Brasillensis (Kunth) Muell. Arg.

By Nzekwe, Uchendu

The anatomy of the mature bark of eleven clones of para-rubber, Heves brasilliensis (KUNTH) MUEU, ARC. was studied, to assess the relationship
between their structural features and latex yield, and to identify clones with synergistic combinations of yield determinants, which may be of interest to breeders and farmers,

Published: 02/12/2018

Tags: anatomy, Mature Bark and Fungal Degradation of the Wood, Para-Rubber, Hevea Brasillensis

Size: 3.00MB

PHYTOPLANKTONS PRODUCTION IN RELATION TO PHYSIO-CHEMICAL STATUS IN OGELUBE LAKE, OPI, ANAMBRA STATE

By Nkechinyere Onyekwere Nwaeze

THE RATE OF PHYTOPLANKTONS PRODUCTION IN oGELUBE lAKE, oPI, nSUKKA WAS DETERMINED. It was related to seasonal variations in phytoplanktons population and physio-chemical parameters such as depth, PH, temperature, iron, transparency, colour, alkalinity, oxygen, sulphide, total dissolved solids, phosphates, nitrates, silica and ammonia nitrogen

Published: 02/12/2018

Tags: phytoplanktons, physio-chemical parameters, PH, temperature, iron, transparency, colour, alkalinity, oxygen, sulphide, total dissolved solids, phosphates, nitrates, silica and ammonia nitrogen

Size: 3.88MB

Cytological and Breeding Studies of Soyabean (Glycine Max (L.) Merill)

By Ebot, Martin Etchi

Six cultivars of soybean collected from two localities were used in green house, field and laboratory experiments, to investigate their yields and yield attributes protein content and chromosome number.

Published: 07/07/1991

Tags: Cytological and Breeding Studies of Soyabean

Size: 3.72MB

WOODY BIOCHAR COMBINED WITH TWO NUTRIENT SOURCES PROMOTES GERMINATION, SEEDLING GROWTH AND YIELD OF OKRA GROWN IN DEPLETED SANDY SOIL

By Oburo, Francisca Onyebuchi

The chronic problem of soil depletion, acidification and erosion, caused by poor agricultural practices and reckless burning of organic materials have compounded the problem of food security and climate change in South Eastern Nigeria. Currently not much has been done to check these problems. Controlled burning of organic materials under reduced or absence of oxygen (pyrolysis) produces biochar which can address these problems and much more. This study was carried out to produce biochar from Gmelina (BCGM) and Pentaclethra (BCPE) wood offcuts and combine them with poultry droppings (PD) and NPK (NPK 15:15:15, chemical fertilizer) in varied forms to determine the best combination for amendment of acidic sandy soil from Opi valley in Nsukka. Both screen house and field studies covering seed germination, seedling growth and yield of okra (Abelmoschus esculentus (L.)(Moench) were carried out in a repeated experiment (experiment 1 and 2) at the Botanic garden, University of Nigeria Nsukka, using CRD and RCBD designs respectively for the two locations of the studies.

Published: 02/12/2018

Tags: woody biochar, germination, seedling growth, okra, depleted sandy soil

Size: 7.45MB

SCREENING OF THREE STANDARD BASAL MEDIA FOR IN VITRO PROPAGATION OF GLYCINE MAX LINN. ZYGOTIC EMBRYOS

By Okoro, Chinalurum Peace

Three different standard basal media were screened for the propagation of Glycine max Linn. zygotic embryos in vitro. The media employed were those of Murashige and Skoog (MS) (1962), Gamborg et al. (B5) (1968) and Schenk and Hildebrandt (SH) (1972). This study was done to determine the most suitable medium for the propagation of G. max Linn. zygotic embryos. The results obtained showed that although all the three basal media screened supported the in vitro propagation of the embryos but MS medium was the most effective in this respect. The embryos with the longest shoot (10.98 ± 1.00 cm), longest root (5.5 ± 0.59 cm) and highest fresh weights (0.2682 ± 1.00 g) were observed among those cultured in the MS medium whereas the B5 medium produced embryos with the highest percentage sprout (28.57 ± 0.51 %) and SH medium produced the highest sprout rate (0.4575 ± 0.384). The embryos were able to develop into normal plantlets even in the absence of externally applied plant growth regulators. This may suggest the presence of endogenous hormone in the zygotic embryos at a level that supported the propagation of the embryos. Also, the levels of ions present in all the media would have been optimum as plantlets which grew into normal seedlings were regenerated in all of them. This work recommends the use of MS medium for the propagation of G.max Linn. zygotic embryos as it proved to be the most effective of the three media screened.

Published: 02/12/2018

Tags: basal media, in vitro propagation, glycine max linn, zygotic embryos

Size: 11.18MB

WOODY BIOCHAR COMBINED WITH TWO NUTRIENT SOURCES PROMOTES GERMINATION, SEEDLING GROWTH AND YIELD OF OKRA GROWN IN DEPLETED SANDY SOIL

By Oburo, Francisca Onyebuchi

The chronic problem of soil depletion, acidification and erosion, caused by poor agricultural practices and reckless burning of organic materials have compounded the problem of food security and climate change in South Eastern Nigeria. Currently not much has been done to check these problems. Controlled burning of organic materials under reduced or absence of oxygen (pyrolysis) produces biochar which can address these problems and much more. This study was carried out to produce biochar from Gmelina (BCGM) and Pentaclethra (BCPE) wood offcuts and combine them with poultry droppings (PD) and NPK (NPK 15:15:15, chemical fertilizer) in varied forms to determine the best combination for amendment of acidic sandy soil from Opi valley in Nsukka. Both screen house and field studies covering seed germination, seedling growth and yield of okra (Abelmoschus esculentus (L.)(Moench) were carried out in a repeated experiment (experiment 1 and 2) at the Botanic garden, University of Nigeria Nsukka, using CRD and RCBD designs respectively for the two locations of the studies.

Published: 02/12/2018

Tags: woody biochar, germination, seedling growth, okra, depleted sandy soil

Size: 7.45MB

In vitro and Breeding Studies of the African Yam Bean, Sphenosstylis stenocarpa (Hochst ox, A. Rich) Harms

By Kanu, Joy Ijeoma

Six cultivars of the African yam bean (sphenostylis stenocarpa) were used in field and laboratory experiments designed to study the crop yield and to explore the possibility of raising plants through invitro cu1ture techniques.

Published: 02/12/2018

Tags: African Yam Bea, Sphenosstylis stenocarpa

Size: 15.57MB

The Cell Wall Structure And The Industrial Utilization Of The Oil Of Para Rubber Seed In Paint Manufacture

By Njoku, Obioma Uzoma

The Cell Wall Structure And The Industrial
Utilization Of The Oil Of Para Rubber Seed In
Paint Manufacture

Published: 19/09/1994

Tags: Cell Wall Structure, Industrial Utilization, Para Rubber, Seed, Paint Manufacture

Size: 9.41MB

FACTORS INDUCING MULTIPLE SHOOT FORMATION FROM EMBRYO EXPLANTS OF PINUS CARIBARAVA YAR, ILONDURENESS IN VITRO

By G.i. Ameh,, S.n.c. Okongkwo,, et al

Embryo emplant of pinus carbaera development multiple shoots when cultured on von anold and larkson basal medium supplemented with benzylamino parime

Published: 18/09/1999

Tags: factors inducing multiple shoot formation

Size: 772.24KB

Studies on Nodulation and Yield of Cowpea (Vigna unguiculata (L) Walp)

By Kwaye, Romanus Galako

Thirty-five (35) cultivars of cowpea (Vigna unguiculata (L.) Walp.). were used
in pot and field experiments to investigate nodulation pattern wih plant biomass and the relationship between yield and yield attributes. Nodule initiation was observed within 5 days after emergence in all the cowpea varieties

Published: 12/03/1998

Tags: Nodulation and Yield of Cowpea, Vigna unguiculata (L) Walp, KWAYE, Romanus Galako 1998

Size: 24.38MB

Studies on Nodulation and Yield of Cowpea (Vigna unguiculata (L) Walp).

By Kwaye, Romanus Galako

Thirty-five (35) cultivars of cowpea (Vigna unguiculata (L.) Walp.). were used
in pot and field experiments to investigate nodulation pattern with plant biomass and the relationship between yield and yield attributes. Nodule initiation was observed within 5 days after emergence in all the cowpea varieties. Identifiable nodules were observed 15 days after sowing in most of the cultivars. V,, (IT89K-355); V2,(IT91K-1 18-20) and V, (Local cultivar) recorded the highest number of nodules among the cultivars while
V,, (Ir1'931

Published: 16/03/1998

Tags: nodulation, cowpea, vigna unguiculata, Botany, Kwaye

Size: 24.38MB

In Vitro Studies On Explants And Field Studies On Mycorrhizal Associations Of Pinus Cribaea Mor. Var Hondurensis Barr. And Golf.

By Akaneme, Florence I.

Multiple shoot induction from embryos and shoot tip explants was
investigated as a possible means for inass propagation of Pinus caribaea Mor. Var.
Hondurensis. A mean of eleven (1 1) shoots per embryo was obtained whilc a
mean of 12 and 17 shoots were obtained for one-week old and five-week old
shoot tips respectively. l'he concentration of Benzyllilnino purine (BAP)
influenced bud formation and the development and elongation of s h ~ o t sw ere
enhanced by elimination of BAP, reduction of sucrose concentration as well as the
addition of activated charcoal to the medium. Growth of callus and possible
plantlet regeneration thereof; callus greening, growth habits and anthocyanin
production were also studied by manipulating the hormonal composition of the
medium. Occurrence of callus variarts during subcultures and its ~ncchanism
were also investigated.
Best growth of callus was achieved in Von Arnold and Eriksson, (AE)
(1981) medium containing 2mgl-' NAA alone and also in the interaction 2ingl-'
113A x 0.5mgl~B' AP. Multiple shoot induction was not achieved. However, callus
greening (associated with shoot initialion) was best pronloted by the main effects
of kinetin (5mgl-'); BAP (5mgle') and NAA (2mgl-'). Two forms of callus growth
habits were observed - loose friable and compact calluses. In NAA x kinctin

Published: 13/03/1999

Tags: explants, mycorrhizal

Size: 19.46MB

COMPARATVE STUDIES ON THE HEAVY METAL CONCENTRATION IN LEAF, STEM AND ROOT OF CORCHORUS OLITORIUS L. IRRIGATED WITH SEWAGE WATER AND TAP WATER RESPCTIVELY.

By Udoji, Adaugo Ozioma

ABSTRACT
The level of accumulation of heavy chemicals in the leaves, stem and roots of Corchorus olitorius seedlings irrigated with sewage (Sewage effluent) and tap water to maturity respectively was investigated. Prior to irrigation, water quality indicators and physico-chemical properties of the two water sources were analysed. The experiment, a completely randomized design was carried out in a screen house in the Botanic Garden of the Department of Plant Science and Biotechnology, University of Nigeria, Nsukka and lasted for four months. The results showed that sewage water had higher values of biochemical oxygen demand (BOD), chemical oxygen demand (COD), and temperature than tap water. The results also showed that tap water had higher values of dissolved oxygen (DO) and transparency than sewage water. The results further showed that sewage water had higher values of the analysed physico-chemical properties than tap water. Again, it showed that sewage water enhanced better seedling growth than tap water. Cadmium, Mercury, Zinc, Copper, Lead and Arsenic accumulation in the leaves, stem and roots were higher in seedlings irrigated with sewage water when compared with those irrigated with tap water. The results further showed that the accumulation of heavy chemicals in the leaves, stem and roots of the seedlings irrigated with both water sources, (Sewage and tap) were higher than the accepted standard of the Federal Environmental Protection Agency (FEPA). Based on the results obtained, it is recommended that continued production of leaf vegetables off-season using sewage water be avoided, because of possible health hazards posed by continued consumption of such vegetables.

Published: 03/02/2016

Tags: CORCHORUS OLITORIUS , IRRIGATION, SEWAGE WATER, TAP WATER.

Size: 2.24MB

Studies on the Morphology, Phenology and Seed Germination of Pentaclethra macrophylla Benth.

By Osayi, Emmanuel Emeka

The morphology, phenology and seed germination of the multipurpose African oil bean tree, Pentaclethra macrophylla Benth. belonging to the family Fabaceae were studied. The study area covered the entire Nsukka zone of Enugu State, Nigeria, and the ten towns randomly selected included: Adani, Amalla Egazi, Ede Oballa, Eha Alumona, Eha Amufu, Ibagwa, Imilike, Nsukka, Ogrute and Orba. Morphological aspects of the study included: the bole type, branching pattern, leaf types, leaf arrangement and crown shape; height of the trees and girth of the bole at breast height; size of the leaves, raches and leaflets; thickness of the bark, length of some of the buttress roots and diameter of the roots 20 cm away from the stem; type of inflorescence and flower, and morphology of pollen. The morphology of the seedling of P. macrophylla was studied and photographed from the onset of seed germination up to 40 days after germination. The phenological aspects of the species studied were period of flowering, fruiting, leaf fall (defoliation) and replacement (refoliation), fruit maturity and ripening. The phenological observations were made every month for three years (2009, 2010 and 2011). There were two flowering periods of the species within a season (May to June and October to February). Fruiting took place between December and the following August. Defoliation of P. macrophylla trees occurred mainly between the months of April and September, with very negligible percentage in the rest of the months. Refoliation was observed from the month of October to March. Fruit maturation and seed dispersal in the locations sampled started in April and ended in November in the three years of sampling. Seed germination was carried out to determine the effects of different types of media on seed germination and seedling growth of P. macrophylla. The media used were Garden soil (which served as control), saw dust (SD), 1:1 mixture of Saw dust and Garden soil (SD+GS), 1:1:1 mixture of Saw dust, Garden soil and Poultry droppings (SD+GS+PD), 1:1 mixture of Garden soil and Poultry droppings (GS+PD), 1:1 mixture of Saw dust and Poultry droppings (SD+PD). The highest percentage germination response was obtained using SD+GS+PD and GS+PD respectively which differed significantly (P

Published: 03/02/2016

Tags: Pentaclethra macrophylla Benth, Germination,Morphology.

Size: 19.11MB

AETIOLOGY OF THE FUNGAL ROT OF CUCUMBER FRUIT (CUCUMIS SATIVUS L.) AND THE EFFICACY OF ITS CONTROL WITH PHYTOCHEMICALS FROM CRUDE EXTRACTS OF TWO PLANTS.

By Onaebi, Chiemeka Nwakego

The aetiology of the fungal rot of cucumber fruit (Cucumis sativus L.) in Enugu State was investigated. Five fungal pathogens were isolated from diseased cucumber fruits. They were identified as Fusarium oxysporum Schlecht, Aspergillus niger Van Tiegh, Rhizopus stolonifer Ehrenb. ex.Fr, Geotrichum candidum Link and Mucor micheli ex Staint – Amans. The pathogenicity tests proved them as the causal agents of the rot. The effects of ethanolic extracts of Chromolaena odorata and Moringa oleifera and benlate solution on the isolates were also determined. The ethanolic extracts of the test plants inhibited mycelial growth of the pathogens in vitro as well as in vivo. The inhibitory effects of the extracts increased with increase in concentration. All concentrations of 20 mg/ml to 100 mg/ml reduced the mycelial growth of the pathogens to some significant (P > 0.05) level. Benlate solution also reduced the mycelial growth of the pathogens. Phytochemical analysis of C. odorata revealed the presence of tannins, saponins, phenols, flavonoids, terpenoids, glycosides and alkaloids while M. oleifera contained all the phytochemicals except alkaloids. The presence of these active ingredients in the extracts may have contributed to their inhibitory properties. These findings suggest that plant extracts could serve as potential sources of bio-fungicides.

Published: 02/07/2014

Tags: CUCUMBER FRUIT, FUNGAL ROT, AETIOLOGY.

Size: 1.44MB