The modification of antigenic properties of tissues during seed germination and development of horse bean plants (Vicia faba)

1964 ◽  
Vol 6 (3) ◽  
pp. 202-208 ◽  
Author(s):  
V. Ghetie ◽  
L. Buzila
Plants ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 173
Author(s):  
Abeer F. Desouky ◽  
Ahmed H. Ahmed ◽  
Hartmut Stützel ◽  
Hans-Jörg Jacobsen ◽  
Yi-Chen Pao ◽  
...  

Pathogenesis-related (PR) proteins are known to play relevant roles in plant defense against biotic and abiotic stresses. In the present study, we characterize the response of transgenic faba bean (Vicia faba L.) plants encoding a PR10a gene from potato (Solanum tuberosum L.) to salinity and drought. The transgene was under the mannopine synthetase (pMAS) promoter. PR10a-overexpressing faba bean plants showed better growth than the wild-type plants after 14 days of drought stress and 30 days of salt stress under hydroponic growth conditions. After removing the stress, the PR10a-plants returned to a normal state, while the wild-type plants could not be restored. Most importantly, there was no phenotypic difference between transgenic and non-transgenic faba bean plants under well-watered conditions. Evaluation of physiological parameters during salt stress showed lower Na+-content in the leaves of the transgenic plants, which would reduce the toxic effect. In addition, PR10a-plants were able to maintain vegetative growth and experienced fewer photosystem changes under both stresses and a lower level of osmotic stress injury under salt stress compared to wild-type plants. Taken together, our findings suggest that the PR10a gene from potato plays an important role in abiotic stress tolerance, probably by activation of stress-related physiological processes.


1958 ◽  
Vol 35 (4) ◽  
pp. 703-711 ◽  
Author(s):  
C. J. BANKS ◽  
H. L. NIXON

1. To test the idea of Herzig (1937) that the excretion and feeding rates of aphids are stimulated by attendant ants, bean plants (Vicia faba), on which groups of nymphs of Aphis fabae were feeding, were made radioactive with 32P in water culture, so that the aphids took up the isotope and excreted it in their honeydew. The radioactivity of the honeydew taken from them by attendant Lasius niger was then compared with that of the honeydew excreted concurrently by unattended control aphids on separate plants. 2. By increasing their uptake of plant sap the ant-attended aphids produced twice as much radioactivity in their excreta as did the ant-free aphids. 3. The aphids directly control their rates of excretion and feeding, which are not determined solely by forces within the plant. 4. The aphid apparently controls its feeding by the ‘sucking pump’ in its head. It is suggested that the pump is normally closed but that periodically it opens to admit sap into its lumen and then closes ventrally to force the ingested sap into the stomach. During normal feeding the pump probably opens and closes at regular intervals; but when the aphid is ant-attended it could operated more frequently so as to force sap into the stomach more often. The uptake of sap by normally feeding aphids is apparently not continuous.


Euphytica ◽  
2012 ◽  
Vol 186 (3) ◽  
pp. 897-905 ◽  
Author(s):  
M. Fernández-Aparicio ◽  
A. Moral ◽  
M. Kharrat ◽  
D. Rubiales

1967 ◽  
Vol 13 (5) ◽  
pp. 439-446 ◽  
Author(s):  
A. Thomas ◽  
D. Parkinson

An attempt was made, using the soil-washing box technique, to obtain detailed information about the initiation of the rhizosphere mycoflora of dwarf bean seedlings.Tabulated information of the fungi isolated from washed non-rhizosphere soil and washed rhizosphere soil from plants during the first 20 days after seed germination is presented together with data of the fungi isolated from the waters in which these soil samples were washed. These data are discussed in relation to previous observations of fungi isolated from rhizospheres by other methods.The results obtained revealed that in the early days after seed germination the rhizosphere mycoflora was qualitatively similar to that of the non-rhizosphere soil. However, a number of distinct differences were discernible between the rhizosphere and non-rhizosphere populations even at these early stages of plant growth, namely that Cylindrocarpon radicicola, Humicola grisea, and a sterile sclerotial form (W1) were isolated with increased frequency from the rhizosphere, whereas Trichoderma viride was consistently isolated less frequently from the rhizosphere than from non-rhizosphere soil.


2017 ◽  
Vol 69 (4) ◽  
pp. 165-170
Author(s):  
F. Casierra-Posada ◽  
J. Cutler ◽  
D. Reyes-Copasachoa
Keyword(s):  

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Fangwen Yang ◽  
Hongwei Chen ◽  
Changyan Liu ◽  
Li Li ◽  
Liangjun Liu ◽  
...  

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