Influence of Formadehyde Fumigation and Fytolan Drench on the Vesicular-Arbuscular Mycorrhizal Status of Some Forest Tree Seedlings in an Indian Nursery

2004 ◽  
Vol 70 (1) ◽  
pp. 11-16
Author(s):  
V. Sugavanam ◽  
K. Udaiyan ◽  
S. Manian
Keyword(s):  
Arbuscular Mycorrhizal ◽  
Forest Tree ◽  
Tree Seedlings ◽  
Mycorrhizal Status ◽  
Vesicular Arbuscular

Symbiotic Vesicular-Arbuscular Mycorrhizae Influence Maximum Rates of Photosynthesis in Tropical Tree Seedlings Grown Under Elevated CO2

1997 ◽  
Vol 24 (2) ◽  
pp. 185 ◽  
Author(s):  
C. E. Lovelock ◽  
D. Kyllo ◽  
M. Popp ◽  
H. Isopp ◽  
A. Virgo ◽  
...  
Keyword(s):  
Elevated Co2 ◽  
Arbuscular Mycorrhizae ◽  
Forest Tree ◽  
Sink Strength ◽  
Tree Seedlings ◽  
Va Mycorrhizae ◽  
Co2 Concentrations ◽  
Vesicular Arbuscular ◽  
Mycorrhizal Plants ◽  
Atmospheric Co2 Concentrations

To investigate the importance of phosphorus and carbohydrate concentrations in influencing photosynthetic capacity of tropical forest tree seedlings under elevated CO2, we grew seedlings of Beilschmiedia pendula (Sw.) Hemsl. (Lauraceae) under elevated CO2 concentrations either with or without vesicular-arbuscular (VA) mycorrhizae. VA-mycorrhizae increased phosphorus concentrations in all plant organs (leaves, stems and roots). Maximum rates of photosynthesis (Amax) measured under saturating levels of CO2 and light were correlated with leaf phosphorus concentrations. VA-mycorrhizae also increased leaf carbohydrate concentrations, particularly under elevated CO2, but levels were low and within the range observed in naturally occurring forest species. Root carbohydrate concentrations were reduced in VA-mycorrhizal plants relative to non-mycorrhizal plants. These results indicate an important role for VA-mycorrhizae in controlling photosynthetic rates and sink strength in tropical trees, and thus in determining their response to future increases in atmospheric CO2 concentrations.

Effect of phosphate solubilizing bacteria and arbuscular mycorrhizal fungi with and without rock phosphate on four forest tree seedlings

2016 ◽  
Vol 6 (01) ◽  
pp. 5204 ◽  
Author(s):  
Sharanappa Jangandi ◽  
Chaitra B. Negalur* ◽  
Mr. Narayan ◽  
H. C. Lakshman
Keyword(s):  
Plant Growth ◽  
Mycorrhizal Fungi ◽  
Rock Phosphate ◽  
Arbuscular Mycorrhizal ◽  
Am Fungi ◽  
Forest Tree ◽  
P Uptake ◽  
Tree Seedlings ◽  
Phosphate Solubilizing Bacteria ◽  
Vigorous Plant

The effect of phosphorus solubilizing bacteria Bacillus polymyxa and AM-mycorrhizal fungi Rhizophagus fasciculatus with and without rock phosphate treatments on growth of Terminalia paniculata and T. tomentosa were studied in nursery. The results showed that the combined inoculation of both PSB, AM fungi and rock phosphate produced vigorous plant growth of tree seedlings for quick planting. The experiments clearly demonstrated that the combined inoculation of PSB and AM fungi brought marked increase in plant growth, dry matter, and P uptake when, compared to individual inoculants or non-inoculated plants. The increase in growth was attributed to the increase in P uptake in shoots of the seedlings. The results indicated that both organisms have synergistic effect with additional 250 mg RP/kg rock phosphate treatment for T.paniculata Roth. and 150 mgRP/kg for T.tomentosa W.& A. in green house conditions.

Mycorrhizal status of some plants of southwestern British Columbia

1988 ◽  
Vol 66 (10) ◽  
pp. 1924-1928 ◽  
Author(s):  
Shannon M. Berch ◽  
Sharmin Gamiet ◽  
Elisabeth Deom
Keyword(s):  
British Columbia ◽  
Plant Species ◽  
Arbuscular Mycorrhizal ◽  
Vancouver Island ◽  
University Of British Columbia ◽  
Mycorrhizal Status ◽  
Vesicular Arbuscular ◽  
First Time

During the summer of 1986, plants were collected from University of British Columbia Research Farm at Oyster River, Vancouver Island, and their mycorrhizal status was determined. Of the 60 plant species examined, 44 were always vesicular–arbuscular mycorrhizal, 13 were always nonmycorrhizal, and three varied. Nonmycorrhizal plants were found in species belonging to the following families: Araceae, Caryophyllaceae, Compositae, Cruciferae, Gramineae, Onagraceae, Polygonaceae, and Portulacaceae. The mycorrhizal status of 15 plant species is reported here for the first time. Of these, the nonmycorrhizal species included Lysichitum americanum (Araceae), Stellaria simcoei, Stellaria calycantha (Caryophyllaceae), and Epilobium minutum (Onagraceae), and the mycorrhizal species included Adenocaulon bicolor, Eriophyllum lanatum var. achillaeoides, Grindelia squarrosa var. serrulata (Compositae), Poa gracillima (Gramineae), Brodiaea coronaria, Disporum hookerii (Lilaceae), Polypodium glycyrrhiza (Polypodiaceae), Ranunculus uncinatus (Ranunculaceae), Rosa nutkana var. nutkana (Rosaceae), Collinsia parviflora (Scrophulariaceae), and Viola glabella (Violaceae).

Development of Efficient Production Systems for Forest Tree Seedlings

2019 ◽  
Vol 73 (2) ◽  
pp. 120-122
Author(s):  
Naoki Negishi ◽  
Katsuhiko Nakahama ◽  
Nobuyuki Urata ◽  
Toshiaki Tanabe
Keyword(s):  
Production Systems ◽  
Forest Tree ◽  
Efficient Production ◽  
Tree Seedlings

Occurrence of Vesicular-Arbuscular Mycorrhizal Fungi in Alberta, Canada

1993 ◽  
Vol 48 (11-12) ◽  
pp. 923-929 ◽  
Author(s):  
S. M. Boyetchko ◽  
J. P. Tewari
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Fungal Species ◽  
Glomus Aggregatum ◽  
X Ray ◽  
Vesicular Arbuscular ◽  
Spore Walls ◽  
Scanning Electron

Abstract Three V A mycorrhizal fungal species were isolated from soils in Alberta, Canada and examined by scanning electron microscopy and energy-dispersive X-ray microanalysis. Mature spores of Glomus aggregatum developed an outer hyaline wall which contained lower levels of calcium than the middle wall. Examination of G. pansihalos spores revealed a lower level of calcium in the outer evanescent wall as compared to the ornamented wall. When spores of Entrophospora infrequens were examined, the wall of the vesicle was found to contain similar levels of calcium as the ornamented wall of the spore. The significance of the results concerning the presence of calcium in mycorrhizal spore walls is discussed, as is the occurrence of the mycorrhizal species.

scholarly journals Fire suppression and seed dispersal play critical roles in the establishment of tropical forest tree species in southeastern Africa

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tomohiro Fujita
Keyword(s):  
Seed Dispersal ◽  
Tree Species ◽  
Seedling Survival ◽  
Fire Suppression ◽  
Forest Tree ◽  
Tree Seedlings ◽  
Seedling Mortality ◽  
Forest Tree Species ◽  
Seed Deposition ◽  
Syzygium Guineense

AbstractThis study examined the mechanisms of facilitation and importance of seed dispersal during establishment of forest tree species in an Afrotropical woodland. Seedling survival of Syzygium guineense ssp. afromontanum was monitored for 2.5 years at four different microsites in savannah woodland in Malawi (southeastern Africa) under Ficus natalensis (a potential nurse plant), Brachystegia floribunda (a woodland tree), Uapaca kirkiana (a woodland tree), and at a treeless site. The number of naturally established forest tree seedlings in the woodland was also counted. Additionally, S. guineense ssp. afromontanum seed deposition was monitored at the four microsites. Insect damage (9% of the total cause of mortality) and trampling by ungulates (1%) had limited impact on seedling survival in this area. Fire (43%) was found to be the most important cause of seedling mortality and fire induced mortality was especially high under U. kirkiana (74%) and at treeless site (51%). The rate was comparatively low under F. natalensis (4%) and B. floribunda (23%), where fire is thought to be inhibited due to the lack of light-demanding C4 grasses. Consequently, seedling survival under F. natalensis and B. floribunda was higher compared with the other two microsites. The seedling survival rate was similar under F. natalensis (57%) and B. floribunda (59%). However, only a few S. guineense ssp. afromontanum seedlings naturally established under B. floribunda (25/285) whereas many seedlings established under F. natalensis (146/285). These findings indicate that the facilitative mechanism of fire suppression is not the only factor affecting establishment. The seed deposition investigation revealed that most of the seeds (85%) were deposited under F. natalensis. As such, these findings suggest that in addition to fire suppression, dispersal limitations also play a role in forest-savannah dynamics in this region, especially at the community level.

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