Ecological Studies of Opi Lake Savanna Woodland
Seedling Morphology and Growth analysis studies of African Yam Bean, Sphenostylis Stenocarpa (Hoechst. Ex. A. Rich.) Harms.
Studies on the Anatomy of the Mature Bark and Fungal Degradation of the Wood of Para-Rubber, Hevea Brasillensis (Kunth) Muell. Arg.
Studies On Some Aspects Of The Biology, And Ecology Of Irvingia Wombolu (Vermoesen) Syn. I. Gabonensis Var. Excelsa
PHYTOPLANKTON PRODUCTION IN RELATION TO PHYSICO-CHEMICAL STATUS IN OGELU LAKE,OPI,ANAMBRA STATE
Studies on Growth, Sporullation and Germination of Choanephora Cuccurbitarum and the Effects of Fungicides on In Vitro Development of the Fungus
STUDIES ON THE IRISH POTATO ( SOLANUM TUBEROSUM L.)
Bioremediation of Crude Oil-Polluted Soil Using Bacteria and Poultry Manure, Monitored Through Soybean Productivity
PHYTOPLANKTON PRODUCTION IN RELATION TO PHYSICO-CHEMICAL STATUS IN OGELUBE LAKE, OPI, ANAMBRA STATE
mature embryos of dioscorea rotundata pair(white guinnea facta colllus on gainborg s b5 medium supplemented with a range of 2-10mg-1
A rcliablc and fasl proloco1 is clescrihed for plant regeneration and enhanced tuberiiration in I)iotrorc.n bvlhfirn
1. . a ~ncdicinallyim portant ~)lanol f thc family L)ioscoreaceae. Shoot organogencsis was irlducctl in temir~ala nd
rdlary metistems within 28 days on MS. R5 and SI-1 basal mcdia supplemented with 0.1 - I .O mgl ' benzyladcnitle.
Rooling of shoots occurrcd spntancously within 21 days on MS rncdia i n the ahscncc ofrnixi~~hsu,t was suhstanlinlly
cnhancctl (within 14 days) in mcdia supplemented with 2-5 mg1.l indolcbulyric acid. Up to 93 per cent
plantlet survival was achieved whcn rooted plantlets were hardened using top soil + coconut husk (I: I ) as subswatc,
prior to transfcr to potted soil in the greenhouse. Incorporation of abscisic acid at 0.02-0.20 mgl-' into the
planting substrate rcsultccl in significant depression of root and shoot growth while enhancing early tuberiaation
with consequcnt partitioning of assimilates in favour of tuber growth in the later growth phase.
I3io1-c1ncdiationo f crude oil - contaminated soil samples was carried out by
rnanipulatiiig natural bioremediation process through seeding with
cndogcnous oil degrading bacteria and addition of poultry manure. Their
cIficacy was monitored through their influences on germination and
productivity or soybean (Glycine max (L) Merr. ). Isolates were subjected to
imorphological, physiological and biochemical tests, and identified according
to 13ergy's Manual of Determinative Bacteriology as Pseudomonas sp. and
13crcill~r.s sp. . 8kg of soil, from the Botanical Garden. University of Nigeria
Nsultlta was placed in each of 56 bags and contaminated with 200 mls of
crudc oil. l'he contaminated soil was inoculated with 1L culture of
l?sc~/do~n~(~1.n5a xs 10' cell concentration). The same was repeated with 1 L
culturc o I~acillus (1.5 x cell concentration), 1L culture of
l',scz/do~nonus and Bacillus (consortium) (500ml each), 1 L of nutrient broth,
arid 2g ol' poultry manure separately. One set was left without any treatment
while I sct (control) was left without crude oil or treatment. They were
carsicd out in 8 replicates using completely randomized design. Three seeds
ol' soybcan were planted per bag after 30 days. The results from the
parameters measured showed that the control (without crude oil treatment)
had thc highest mean number of germination, plant height, leaf area, number
ol' Ilowcl-s and pods when compared to other treatments. This was followed
by the consortiuin (Pseudomonas combined with Bacillus), Pscudornonas,
/3acilltis, poultry manure, nutrient broth and crude oil in that order. ANOVA
sliowcd that the overall results of each of these treatments were significant at
1' < 0.05. From the result of the present study, the use of bacteria
(bioaugnicntation) and poultry manure (biostimulation) appears reinediative
to cruclc oil polluted soil.
The growth pattern of the white guinea yam, Jioscorea rotundat2
Poir raised from seed was studied in the glasshouse and the field
from May through November, 1978 and 1979 by the method of growth analysis.
Observations were made on the changes in the dry weights of the organs
produced, with time. Definite waves i n the developnent of the various
organs have been shown which are comparable to the patterns e a r l i e r
reported for plants raised from tuber. This study has also furnished
data on several aspects of the growth pattern of this plant otherwise
neglected by earlier attempts to raise Dioscorea rotundeta from seed.
Derived data on the growth analytical parameters were also compared
with results obtained for some other tropical plants.
Investigations into the growth pattern of Dioscorea rotundata
using the f i r s t generation tubers derived from plants originally
raised from seed as the planting material, showed that the pattern of
growth is very similar to that reported for plants raised from tubers
derived frm continuous vegetative propagation.
Investigations i n t o the effect of photoperiod on growth and
tuberization of Dioscorea rotundatel plants raised from seed revealed
that although short days enhanced tuber growth and suppressed leaf,
vine and root growth, while long days had an opposite effect, there
was xm difference in the total weight of the entire plant due to the
different daylengths. Also tuber initiation was not under photoperiodic
control while tuber growth (bulking) was enhanced by short days.
Studies were carried out 0n the yield and qualit of four coconut (Cocos
r l t r c j /h L.) varities which include the west african Tall (WA'f'), Malayan Green dwarf(MGD)
Boost in ~ndustriadl !;velopment of Nigeria now requires a greater supply of diverse
carbohydrate, protein and oil crops as raw materials for industry, feed and food. Grain
legumes and cereals have advantage over ioot and tuber crops because:
I. Grain seeds are small, cheaper and easier to provide planting material for large
hectarages; while the tuber crops such as yams are propagated from expensive
and bulky waole tuber or sett pieces.
2. Cultivation of grain cereals and legumes is easier to mechanize.
3. Storage of grain cereals and legumes is easier than 'for yams