Comparative performance of the giant cardon cactus (Pachycereus pringlei) seedlings under two leguminous nurse plant species

2006 ◽  
Vol 65 (3) ◽  
pp. 351-362 ◽  
Author(s):  
H. Suzán-Azpiri ◽  
V.J. Sosa
Keyword(s):  
Plant Species ◽  
Nurse Plant ◽  
Comparative Performance ◽  
Pachycereus Pringlei

scholarly journals Association of three succulent plant species with woody canopy in the mixed bushveld, South Africa

Koedoe ◽  
1998 ◽  
Vol 41 (2) ◽  
Author(s):  
I. Thrash
Keyword(s):  
South Africa ◽  
Plant Species ◽  
Arid Areas ◽  
Nurse Plant ◽  
Succulent Plant ◽  
Two Phases ◽  
Possible Cause ◽  
Study Species

Succulents are an important component of the mixed bushveld. Although the nurse plant syndrome is known from arid areas, association of succulents with woody canopy has ot been studied in non-arid areas. The study was done in two phases, the first being to confirm the existence of an association and the second being to investigate a possible cause of the association. The three species studied were all significantly associated with woody canopy. All of the relatively small (0-1 m) Euphorbia ingens plants and most of the relatively small (0-0.5m) Aloe marlothii and Opuntia vulgaris plants encountered were beneath woody canopy. There was a very strong significant association between being damaged by fire and growing between woody canopies for all three species. Fires are likely to be lethal to any plants of the study species that are shorter than about 1 m. In any area where fires are frequent there are likely to be fewer young plants of the study species between woody canopies than there will be within the protection of a bush clump.

Slope orientation enhances the nurse effect of a paramo shrub, Hypericum irazuense (Hypericaceae) in Costa Rica

2009 ◽  
Vol 25 (3) ◽  
pp. 331-335 ◽  
Author(s):  
Alejandro G. Farji-Brener ◽  
Federico A. Chinchilla ◽  
Ainhoa Magrach ◽  
Víctor Romero ◽  
Marcos Ríos ◽  
...  
Keyword(s):  
Plant Species ◽  
Environmental Changes ◽  
Nurse Plant ◽  
Positive Interaction ◽  
Nurse Plants ◽  
Nurse Effect ◽  
The One ◽  
The Impact ◽  
Environmental Mitigation ◽  
Occurrence Of Species

The nurse effect is a positive interaction in which one plant (the nurse) provides conditions that enhance the establishment and growth of another plant species (Callaway 1995). Increased environmental severity appeared to increase the strength of nurse effects (Brooker et al. 2008, Lortie & Callaway 2006). On the one hand, the impact of the nurse effect depends on the magnitude of the environmental changes exerted by the nurse plant. On the other hand, the impact could depend on the number of plant species in the regional pool that respond to such changes. For example, better conditions beneath the crowns of nurse plants might allow the occurrence of species that are sensitive to environmental stress and that occur infrequently in open areas. Thus, if a nurse plant modulates environmental conditions that are critical for the persistence of other plant species, it seems likely that such nurse plants would have greater effects in stressful habitats, where they cause relatively larger environmental mitigation (Badano et al. 2006, Callaway et al. 2002).

Monitoring the Development of Nurse Plant Species to Improve the Performances of Reforestation Programs in Mediterranean Areas

2009 ◽  
pp. 255-265
Author(s):  
R. Duponnois ◽  
M. Hafidi ◽  
J. Thioulouse ◽  
A. Galiana ◽  
L. Ouahmane ◽  
...  
Keyword(s):  
Plant Species ◽  
Nurse Plant ◽  
Mediterranean Areas

Soil microbial community under a nurse-plant species changes in composition, biomass and activity as the nurse grows

2013 ◽  
Vol 64 ◽  
pp. 139-146 ◽  
Author(s):  
S. Hortal ◽  
F. Bastida ◽  
C. Armas ◽  
Y.M. Lozano ◽  
J.L. Moreno ◽  
...  
Keyword(s):  
Microbial Community ◽  
Plant Species ◽  
Soil Microbial Community ◽  
Nurse Plant ◽  
Soil Microbial

A molecular framework for the embryo growth in germinating seeds of Solanum lycocarpum A. St.‐Hil., a nurse plant species

2019 ◽  
Vol 175 (2) ◽  
pp. 136-145 ◽  
Author(s):  
Lilian E. D. Silveira ◽  
João Paulo Ribeiro‐Oliveira ◽  
Daiani Ajala‐Luccas ◽  
Juliana P. Bravo ◽  
Edvaldo A. A. Silva
Keyword(s):  
Plant Species ◽  
Nurse Plant ◽  
Germinating Seeds ◽  
Molecular Framework

scholarly journals Comparison of Efficiency and Specificity of CRISPR-Associated (Cas) Nucleases in Plants: An Expanded Toolkit for Precision Genome Engineering

2018 ◽  
Author(s):  
Oleg Raitskin ◽  
Christian Schudoma ◽  
Anthony West ◽  
Nicola J. Patron
Keyword(s):  
Plant Species ◽  
Genome Engineering ◽  
Bacterial Species ◽  
Gene Families ◽  
Plant Genome ◽  
Parental Line ◽  
High Fidelity ◽  
Related Gene ◽  
Molecular Tools ◽  
Comparative Performance

Molecular tools adapted from bacterial CRISPR (Clustered Regulatory Interspaced Short Palindromic Repeats) systems for adaptive immunity have become widely used for plant genome engineering, both to investigate gene functions and to engineer desirable traits. A number of different Cas (CRISPR-associated) nucleases are now used but, as most studies performed to date have engineered different targets using a variety of plant species and molecular tools, it has been difficult to draw conclusions about the comparative performance of different nucleases. Due to the time and effort required to regenerate engineered plants, efficiency is critical. In addition, there have been several reports of mutations at sequences with less than perfect identity to the target. While in some plant species it is possible to remove these so-called ‘off-targets’ by backcrossing to a parental line, the specificity of genome engineering tools is important when targeting specific members of closely-related gene families, especially when recent paralogues are co-located in the genome and unlikely to segregate. Specificity is also important for species that take years to reach sexual maturity or that are clonally propagated. Here, we directly compare the efficiency and specificity of Cas nucleases from different bacterial species together with engineered variants of Cas9. We find that the nucleotide content correlates with efficiency and that Cas9 from Staphylococcus aureus is comparatively most efficient at inducing mutations. We also demonstrate that ‘high-fidelity’ variants of Cas9 can reduce off-target mutations in plants. We present these molecular tools as standardised DNA parts to facilitate their re-use.

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