scholarly journals Influence of the fungicide TMTD as a stress factor on the ultrastructure of pea (Pisum sativum L.) symbiotic nodules

Author(s):  
A. P. Gorshkov ◽  
A. V. Tsyganova ◽  
V. E. Tsyganov

The negative effects of tetramethylthiuram disulfide (TMTD) on the ultrastructural organization of nodules of pea wild-type line SGE were studied.


Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1488
Author(s):  
Artemii P. Gorshkov ◽  
Anna V. Tsyganova ◽  
Maxim G. Vorobiev ◽  
Viktor E. Tsyganov

In Russia, tetramethylthiuram disulfide (TMTD) is a fungicide widely used in the cultivation of legumes, including the pea (Pisum sativum). Application of TMTD can negatively affect nodulation; nevertheless, its effect on the histological and ultrastructural organization of nodules has not previously been investigated. In this study, the effect of TMTD at three concentrations (0.4, 4, and 8 g/kg) on nodule development in three pea genotypes (laboratory lines Sprint-2 and SGE, and cultivar ‘Finale’) was examined. In SGE, TMTD at 0.4 g/kg reduced the nodule number and shoot and root fresh weights. Treatment with TMTD at 8 g/kg changed the nodule color from pink to green, indicative of nodule senescence. Light and transmission electron microscopy analyses revealed negative effects of TMTD on nodule structure in each genotype. ‘Finale’ was the most sensitive cultivar to TMTD and Sprint-2 was the most tolerant. The negative effects of TMTD on nodules included the appearance of a senescence zone, starch accumulation, swelling of cell walls accompanied by a loss of electron density, thickening of the infection thread walls, symbiosome fusion, and bacteroid degradation. These results demonstrate how TMTD adversely affects nodules in the pea and will be useful for developing strategies to optimize fungicide use on legume crops.



2011 ◽  
Vol 4 (1) ◽  
pp. 489 ◽  
Author(s):  
Kwadwo Ayeh ◽  
YeonKyeong Lee ◽  
Mike J Ambrose ◽  
Anne Hvoslef-Eide


Plants ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 56
Author(s):  
Elizaveta S. Rudaya ◽  
Polina Yu. Kozyulina ◽  
Olga A. Pavlova ◽  
Alexandra V. Dolgikh ◽  
Alexandra N. Ivanova ◽  
...  

The IPD3/CYCLOPS transcription factor was shown to be involved in the regulation of nodule primordia development and subsequent stages of nodule differentiation. In contrast to early stages, the stages related to nodule differentiation remain less studied. Recently, we have shown that the accumulation of cytokinin at later stages may significantly impact nodule development. This conclusion was based on a comparative analysis of cytokinin localization between pea wild type and ipd3/cyclops mutants. However, the role of cytokinin at these later stages of nodulation is still far from understood. To determine a set of genes involved in the regulation of later stages of nodule development connected with infection progress, intracellular accommodation, as well as plant tissue and bacteroid differentiation, the RNA-seq analysis of pea mutant SGEFix--2 (sym33) nodules impaired in these processes compared to wild type SGE nodules was performed. To verify cytokinin’s influence on late nodule development stages, the comparative RNA-seq analysis of SGEFix--2 (sym33) mutant plants treated with cytokinin was also conducted. Findings suggest a significant role of cytokinin in the regulation of later stages of nodule development.



Genes ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1680
Author(s):  
Ricardo Pereira ◽  
José M. Leitão

The spontaneously emerging rogue phenotype in peas (Pisum sativum L.), characterized by narrow and pointed leaf stipula and leaflets, was the first identified case of the epigenetic phenomenon paramutation. The crosses of homozygous or heterozygous (e.g., F1) rogue plants with non-rogue (wild type) plants, produce exclusively rogue plants in the first and all subsequent generations. The fact that the wild phenotype disappears forever, is in clear contradiction with the Mendelian rules of inheritance, a situation that impedes the positional cloning of genes involved in this epigenetic phenomenon. One way of overcoming this obstacle is the identification of plant genotypes harboring naturally occurring or artificially induced neutral alleles, non-sensitive to paramutation. So far, such alleles have never been described for the pea rogue paramutation. Here, we report the induction via 1-ethyl-1-nitrosourea (ENU) mutagenesis of a non-rogue revertant mutant in the rogue cv. Progreta, and the completely unusual fixation of the induced non-rogue phenotype through several generations. The reversion of the methylation status of two previously identified differentially methylated genomic sequences in the induced non-rogue mutant, confirms that the rogue paramutation is accompanied by alterations in DNA methylation. Nevertheless, unexpectedly, the induced non-rogue mutant showed to be still sensitive to paramutation.



2019 ◽  
Vol 17 (4) ◽  
pp. 5-14
Author(s):  
Anna V. Tsyganova ◽  
Viktor E. Tsyganov

Background. The endoplasmic reticulum (ER) is the largest membrane-bound organelle, which plays an important role in the functioning of a plant cell and participates in its differentiation. Materials and methods. Using the methods of transmission electron microscopy, the morphological features and dynamics of structural changes in the ER in symbiotic nodules of pea (Pisum sativum L.) wild-type and mutants blocked at different stages of nodule development were studied. Results. ER developed from a network of individual tubules in meristematic cells, to a developed network of cisterns around the nucleus and plasmalemma, and a network of granular and smooth tubules accompanying infection structures in colonized and infected cells and symbiosomes in infected cells. Conclusions. A correlation was found between the level of development of the ER network and the degree of bacteroid differentiation.



2009 ◽  
Vol 9 (1) ◽  
pp. 76 ◽  
Author(s):  
Kwadwo Ayeh ◽  
YeonKyeong Lee ◽  
Mike J Ambrose ◽  
Anne Hvoslef-Eide


Planta ◽  
1981 ◽  
Vol 151 (6) ◽  
pp. 512-524 ◽  
Author(s):  
V. I. Popov ◽  
D. N. Matorin ◽  
S. V. Gostimsky ◽  
S. V. Tageeva ◽  
B. L. Allakhverdov


Irriga ◽  
1998 ◽  
Vol 3 (1) ◽  
pp. 20-23 ◽  
Author(s):  
Maria Dolores Barbosa Lima

SEED GERMINATION OF PEA (Pisum Sativum, L) UNDER DIFFERENT BORON CONCENTRATION LEVELS  Maria Dolores Barbosa LimaEscola Superior de Ciências Agrárias de Rio Verde - ESUCARVCampus Universitário - Caixa Postal 10475901-970 - Rio Verde , Goiás  1 ABSTRACT                 This experiment attempted to establish the effect of irrigation with water containing different concentration of boron on the germination of pea (Pisum sativum L.), selected as a typical example of dicotyledon plants. 25 seeds were planted in aluminum trays bedded with a layer of cotton of a depth 1 cm, as a germination medium. The media was wetted to saturation with waters of varying boron concentration starting from zero B level (control treatment) up to the highest concentration of 20 (mg.dm-3) B. Germination of peas was not affected by boron concentrations up to 8 (mg.dm-3), and only slightly reduced as 20 (mg.dm-3). Once germinated, the seedling were smaller, took longer to develop and already showed toxicity symptoms when boron was applied in large doses. Hence, large amounts of boron seem to have little influence on germination, but distinct negative effects on the development of plants at the seedling stage. Keywords: irrigation, germination, boron, pea.



2000 ◽  
Vol 148 (11-12) ◽  
pp. 591-595 ◽  
Author(s):  
U. P. Singh ◽  
B. Prithiviraj ◽  
B. K. Sarma


2018 ◽  
Vol 34 (2) ◽  
pp. 229-235 ◽  
Author(s):  
Prachi Garg ◽  
◽  
A. Hemantaranjan ◽  
Jyostnarani Pradhan ◽  
◽  
...  


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