MsPG1 alleviated aluminum-induced inhibition of root growth by decreasing aluminum accumulation and increasing porosity and extensibility of cell walls in alfalfa (Medicago sativa)

2020 ◽  
Vol 175 ◽  
pp. 104045
Author(s):  
Jiaojiao Li ◽  
Liantai Su ◽  
Aimin Lv ◽  
Yanbang Li ◽  
Peng Zhou ◽  
...  
Keyword(s):  
Root Growth ◽  
Medicago Sativa ◽  
Cell Walls ◽  
Aluminum Accumulation

scholarly journals The Arabidopsis TETRATRICOPEPTIDE THIOREDOXIN-LIKE 1 Gene Is Involved in Anisotropic Root Growth during Osmotic Stress Adaptation

Genes ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 236
Author(s):  
María Belén Cuadrado-Pedetti ◽  
Inés Rauschert ◽  
María Martha Sainz ◽  
Vítor Amorim-Silva ◽  
Miguel Angel Botella ◽  
...  
Keyword(s):  
Osmotic Stress ◽  
Root Growth ◽  
Cell Walls ◽  
Primary Root ◽  
Stress Adaptation ◽  
Elongation Zone ◽  
Cortical Cells ◽  
Force Microscopy ◽  
Atomic Force ◽  
The Mean

Mutations in the Arabidopsis TETRATRICOPEPTIDE THIOREDOXIN-LIKE 1 (TTL1) gene cause reduced tolerance to osmotic stress evidenced by an arrest in root growth and root swelling, which makes it an interesting model to explore how root growth is controlled under stress conditions. We found that osmotic stress reduced the growth rate of the primary root by inhibiting the cell elongation in the elongation zone followed by a reduction in the number of cortical cells in the proximal meristem. We then studied the stiffness of epidermal cell walls in the root elongation zone of ttl1 mutants under osmotic stress using atomic force microscopy. In plants grown in control conditions, the mean apparent elastic modulus was 448% higher for live Col-0 cell walls than for ttl1 (88.1 ± 2.8 vs. 16.08 ± 6.9 kPa). Seven days of osmotic stress caused an increase in the stiffness in the cell wall of the cells from the elongation zone of 87% and 84% for Col-0 and ttl1, respectively. These findings suggest that TTL1 may play a role controlling cell expansion orientation during root growth, necessary for osmotic stress adaptation.

Proteomics of Medicago sativa cell walls

2004 ◽  
Vol 65 (12) ◽  
pp. 1709-1720 ◽  
Author(s):  
Bonnie S Watson ◽  
Zhentian Lei ◽  
Richard A Dixon ◽  
Lloyd W Sumner
Keyword(s):  
Medicago Sativa ◽  
Cell Walls

Growth Inhibition and Disruption of Mitosis by DCPA in Oat (Avena sativa) Roots

Weed Science ◽  
1984 ◽  
Vol 32 (6) ◽  
pp. 732-738 ◽  
Author(s):  
Jeffrey D. Holmsen ◽  
F. Dan Hess
Keyword(s):  
Cell Division ◽  
Root Growth ◽  
Growth Inhibition ◽  
Avena Sativa ◽  
Cell Walls ◽  
Root Growth Inhibition ◽  
Predominant Type ◽  
Division Figure ◽  
Normal Mitosis ◽  
Normal Division

One to 5.6 μM DCPA (dimethyl tetrachloroterephthalate) inhibited oat (Avena sativaL. ‘Victory’) root growth within 12 to 18 h. Treated roots were severely stunted and swollen. An analysis of cell division in roots treated with DCPA revealed a disruption of normal mitosis after prophase. Metaphase, anaphase, and telophase division figures were absent 8 to 10 h after treatment with 5.6 μM DCPA. In contrast, a 24-h treatment with 5.6 μM DCPA was necessary to eliminate prophase division figures. The number of aberrant division figures increased concomitantly with the reduction in normal division figures. The predominant type of aberrant division figure was a condensed prophase. When the aberrant division cycle was completed and cells entered interphase, the dispersed chromosomes coalesced to form large, polymorphic nuclei and, occasionally, micronuclei. Approximately 60% of the outer four tiers of cells in roots treated with 5.6 μM DCPA developed abnormal cell walls. These data suggest that DCPA causes root growth inhibition by disrupting several processes involving organized microtubules.

Allelopathic Effects of Sweet Potatoes (Ipomoea batatas) on Yellow Nutsedge (Cyperus esculentus) and Alfalfa (Medicago sativa)

Weed Science ◽  
1986 ◽  
Vol 34 (4) ◽  
pp. 623-627 ◽  
Author(s):  
Howard F. Harrison ◽  
Joseph K. Peterson
Keyword(s):  
Root Growth ◽  
Medicago Sativa ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Cyperus Esculentus ◽  
Sweet Potatoes ◽  
Allelopathic Potential ◽  
Yellow Nutsedge ◽  
Potting Medium ◽  
Wide Range

Greenhouse and laboratory studies were conducted to determine the allelopathic potential of two sweet potato [Ipomoea batatasL. (Lam.)] cultivars, ‘Regal’ and ‘SC 1149-19’. Yellow nutsedge (Cyperus esculentusL. # CYPES) and alfalfa (Medicago sativaL.) plants grown in soil from sweet potato field plots accumulated less dry matter than plants grown in soil from adjacent weedy plots. Growth of yellow nutsedge and alfalfa plants was also reduced when grown in a potting medium containing decomposing sweet potato plants in comparison to plants grown in potting medium alone. When the sweet potato potting medium mixture was incubated at 25 C and tested weekly using an alfalfa growth bioassay, inhibition was high initially but decreased over time and was not observed after a 12-week incubation. Aqueous methanol (50%)-soluble extracts of sweet potato periderm were inhibitory to yellow nutsedge root growth in vermiculite and alfalfa seed germination on filter paper. Regal extracts were inhibitory to yellow nutsedge root growth at a concentration of 2.5 mg periderm extracted/ml, but SC 1149-19 extract was inhibitory only at a concentration eight times higher. Similar differences between cultivars were observed with the alfalfa germination bioassay. Preliminary separation of the Regal periderm extract by paper chromatography indicated the presence of phenolic compounds with a wide range of polarities. Several of these UV-visible compounds were inhibitory to alfalfa germination.

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