The Relation between Xylem Thickenings in Primary Roots of Vicia faba Seedlings and Elongation, as Shown by Soft X-Ray Irradiation

1942 ◽  
Vol 69 (3) ◽  
pp. 221 ◽  
Author(s):  
G. F. Smith ◽  
H. Kersten
Keyword(s):  
Vicia Faba ◽  
X Ray ◽  
Primary Roots

Exotic pulse beetles intercepted in imported legume germplasm

2017 ◽  
Author(s):  
Kavita Gupta ◽  
Shashi Bhalla ◽  
S. P. Singh ◽  
D. S. Meena
Keyword(s):  
Phaseolus Vulgaris ◽  
Vicia Faba ◽  
Vigna Unguiculata ◽  
Russian Federation ◽  
Callosobruchus Rhodesianus ◽  
X Ray ◽  
Lathyrus Odoratus ◽  
Bruchidius Atrolineatus

Quarantine examination of 13,29,901 imported seed samples of various crops during 1999- 2014 revealed presence of exotic bruchids commonly called seed or pulse beetles in 2,819 samples which were detected by X-ray radiography. Thirteen exotic bruchid species viz., Acanthoscelides desmanthi in Desmanths spp. from Colombia, A. obtectus in Phaseolus vulgaris from Argentina, Colombia Mexico, Peru; Bruchidius atrolineatus in Vigna unguiculata from Nigeria; Bruchus affinis in Vicia faba from Afghanistan; B. dentipes in Vicia spp. from Afghanistan, ICARDA (Syria) and Syria; B. ervi in Lens spp. from Afghanistan, Chile, Cyprus, Ethiopia, Germany, Greece, ICARDA (Syria), Iran, Iraq, Italy, Jordan, Lebanon, Mexico, Morocco, Russian Federation, Syria and Turkey; B. nubilis in V. faba from Ukraine; B. rufimanus in V. faba from Afghanistan, Canada, Spain and Syria; B. signaticornis in L. culinaris from ICARDA (Syria); B. tristis in Lathyrus odoratus from ICARDA (Syria); B. tristiculus in V. narborensis from Portugal; Callosobruchus rhodesianus in Vigna unguiculata from Nigeria and C. subinnotatus in V. subterranea from Ghana were intercepted. Many of the pulse beetles were intercepted repeatedly from the same/ different source(s) year after year. All the infested samples were salvaged using suitable disinfestation treatments. None of the intercepted beetles are yet reported from India, and are therefore, of high quarantine significance.

scholarly journals Manganese distribution in the Mn-hyperaccumulator Grevillea meisneri from New Caledonia

2021 ◽  
Author(s):  
Camille Bihanic ◽  
Eddy Petit ◽  
Roseline Perrot ◽  
Lucie Cases ◽  
Armelle Garcia ◽  
...  
Keyword(s):  
Large Scale ◽  
New Caledonia ◽  
Tissue Level ◽  
Cluster Roots ◽  
Transport Pathways ◽  
X Ray ◽  
Mining Sites ◽  
Rehabilitation Programs ◽  
Primary Roots ◽  
Preferential Uptake

Abstract • Grevillea meisneri, an endemic New Caledonian Mn-hyperaccumulator, is used in rehabilitation of degraded mining sites on the island. Large-scale programs require transplanting nursery-grown seedlings, but effects of the nursery environment on Mn tolerance of transplants and their capacity to hyper-accumulate Mn are unknown, slowing rehabilitation efforts.• We studied tissue-level distribution of Mn and other elements in different tissues of G. meisneri using micro-X-Ray Fluorescence spectroscopy (μXRF), comparing nursery-grown plants transplanted into the site and sampled seven years later, and similar-sized plants that had grown spontaneously in the site. • Mirroring patterns in other Mn-hyperaccumulators, Mn was preferentially accumulated in leaves but was also present in roots. Concentrations were highest in leaf epidermal tissues, in cortex and vascular tissues of stems and primary roots, and in phloem and pericycle-endodermis of parent cluster roots. Although abundant in soil, Ni was absent from all tissues of G. meisneri. Ca was always co-localised with Mn. Preferential uptake of Mn vs Ni in roots implies as-yet-uncharacterized specific Mn-transporters, while Ca and Mn co-localisation suggests shared transport pathways. • No differences were observed in concentration and distribution of Mn in transplanted and spontaneously-growing plants. Nursery-grown transplants should be highly suitable for large-scale, high-throughput rehabilitation programs.

Effects of potassium and calcium deficiencies on stomatal functioning in intact leaves of Vicia faba

1994 ◽  
Vol 72 (12) ◽  
pp. 1835-1842 ◽  
Author(s):  
Michèle Ridolfi ◽  
Jean Pierre Garrec ◽  
Philippe Louguet ◽  
Daniel Lafray
Keyword(s):  
Vicia Faba ◽  
Stomatal Closure ◽  
Guard Cells ◽  
Calcium Deficiency ◽  
X Ray ◽  
Free Air ◽  
Vicia Faba L ◽  
Stomatal Sensitivity ◽  
Cell Concentrations ◽  
Stomatal Functioning

The effects of potassium or calcium deficiency on stomatal functioning were investigated in Vicia faba L. plants grown hydroponically. In the leaves of plants grown with 1 mM K+, stomatal opening occurred in light with either normal or CO2-free air; K+ and C1− accumulations in guard cells were similar to those of the control plants grown with 5 mM K+. With the zero K+ treatment, stomatal apertures were not affected, while K+ and Cl− guard cell concentrations fell to 30% of the control values. These results may indicate that other solutes contribute to the lowering of osmotic potential during opening. Stomata of calcium-deficient plants remained fully open in darkness, whereas abscisic acid (ABA) supply induced a partial stomatal closing movement. Therefore, calcium deficiency inhibited the process(es) linked with the perception of darkness and stomatal closure. On the other hand, stomatal sensitivity to ABA was only partially affected. Key words: stomatal aperture, potassium, calcium, X-ray microanalysis.

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