Mentor pollen: Possible role of wall-held pollen growth promoting substances in overcoming intra- and interspecific incompatibility

Genetica ◽  
1977 ◽  
Vol 47 (3) ◽  
pp. 219-229 ◽  
Author(s):  
Kamla Kant Pandey
Keyword(s):  
Interspecific Incompatibility ◽  
Mentor Pollen ◽  
Pollen Growth ◽  
Growth Promoting

Fruit-set after pretreatment with foreign compared with killed compatible pollen

1984 ◽  
Vol 62 (8) ◽  
pp. 1678-1681 ◽  
Author(s):  
W. David Lane
Keyword(s):  
Sweet Cherry ◽  
Direct Evidence ◽  
Fruit Set ◽  
Growth Promotion ◽  
Mineral Analysis ◽  
Foreign Pollen ◽  
Mentor Pollen ◽  
Pollen Growth ◽  
Growth Promoting ◽  
Compatible Pollen

A mechanism based on pollen growth-promoting substances has previously been proposed to explain the effects of mentor (killed compatible) pollen when it improves fertility of crosses between nearly incompatible parents. Similarly, pioneer pollination (two pollinations a day apart) stimulates growth of the last applied pollen and increases fruit-set. In the present experiments the effects of foreign-pollen pioneer treatments on fruit-set of apple, sweet cherry, and apricot were compared with the control, killed compatible pollen. All treatments were followed 24 h later with viable compatible pollen. The foreign pollen, Balsamorrhiza sagittata, did not inhibit fruit-set. When the foreign pollen was heat killed, fruit-set was at least as high as when untreated B. sagittata was used. Two other foreign pollens, Taraxacum officinale and Juniperus communis, resulted in lower fruit-set than B. sagittata but still more than the control. This effect was consistent with a previously hypothesized relationship for mentor pollen, relating size and degree of stimulation. The two nonpollen treatments examined, dried yeast and pectinase solution, slightly inhibited fruit-set. Mineral analysis of a composite of pollen and anther tissue indicated that boron and calcium were not deficient in the control pollen, and incompatibility mechanisms and heat-labile metabolites also were unlikely to have been the cause. No direct evidence was obtained, but pollen growth promotion by a diffusible growth regulator (such as gibberellin) is suggested as plausible and an area worthy of further study.

Unraveling the role of plant growth-promoting rhizobacteria in the alleviation of arsenic phytotoxicity: A review

2021 ◽  
pp. 126809
Author(s):  
Sayanta Mondal ◽  
Krishnendu Pramanik ◽  
Sudip Kumar Ghosh ◽  
Priyanka Pal ◽  
Tanushree Mondal ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting

Role of Pollen-Wall Proteins as Recognition Substances in Interspecific Incompatibility in Poplars

Nature ◽  
1972 ◽  
Vol 237 (5355) ◽  
pp. 381-383 ◽  
Author(s):  
R. B. KNOX ◽  
R. R. WILLING ◽  
ANNE E. ASHFORD
Keyword(s):  
Pollen Wall ◽  
Interspecific Incompatibility

Role of plant growth promoting bacteria in driving speciation gradients across soil-rhizosphere-plant interfaces in zinc-contaminated soils

2021 ◽  
pp. 116909
Author(s):  
Nyekachi C. Adele ◽  
Bryne T. Ngwenya ◽  
Kate V. Heal ◽  
J. Frederick W. Mosselmans
Keyword(s):  
Plant Growth ◽  
Contaminated Soils ◽  
Plant Growth Promoting Bacteria ◽  
Plant Growth Promoting ◽  
Soil Rhizosphere ◽  
Growth Promoting

scholarly journals Plant-Growth-Promoting Rhizobacteria Emerging as an Effective Bioinoculant to Improve the Growth, Production and Stress Tolerance of Vegetable Crops

2021 ◽  
Vol 22 (22) ◽  
pp. 12245
Author(s):  
Manoj Kumar ◽  
Ved Prakash Giri ◽  
Shipra Pandey ◽  
Anmol Gupta ◽  
Manish Kumar Patel ◽  
...  
Keyword(s):  
Plant Growth ◽  
Crop Production ◽  
Insect Pests ◽  
Vegetable Consumption ◽  
Plant Growth Promoting Rhizobacteria ◽  
Vegetable Crops ◽  
Vegetable Crop ◽  
Plant Growth Promoting ◽  
Growth Promoting

Vegetable cultivation is a promising economic activity, and vegetable consumption is important for human health due to the high nutritional content of vegetables. Vegetables are rich in vitamins, minerals, dietary fiber, and several phytochemical compounds. However, the production of vegetables is insufficient to meet the demand of the ever-increasing population. Plant-growth-promoting rhizobacteria (PGPR) facilitate the growth and production of vegetable crops by acquiring nutrients, producing phytohormones, and protecting them from various detrimental effects. In this review, we highlight well-developed and cutting-edge findings focusing on the role of a PGPR-based bioinoculant formulation in enhancing vegetable crop production. We also discuss the role of PGPR in promoting vegetable crop growth and resisting the adverse effects arising from various abiotic (drought, salinity, heat, heavy metals) and biotic (fungi, bacteria, nematodes, and insect pests) stresses.

scholarly journals VEGETATIVE GROWTH OF RAINBOW CHILI (Capsicum annuum L.) IN THE TREATMENT OF PGPR (Plant Growth Promoting Rhizobacteria), PGPR-NPK FERTILIZER, AND PGPR-COMPOST COMBINATION

Agric ◽  
2020 ◽  
Vol 32 (2) ◽  
pp. 95-104
Author(s):  
Jennefer Constantia ◽  
Rejeki Siti Ferniah
Keyword(s):  
Vegetative Growth ◽  
Organic Fertilizer ◽  
Plant Growth Promoting Rhizobacteria ◽  
Optimal Growth ◽  
Randomized Design ◽  
Plant Growth Promoting ◽  
Npk Fertilizer ◽  
Growth Promoting ◽  
Biological Fertilizer

Bolivian Rainbow Chili is one of the ornamental chili varieties which is unique in the form of its colorful fruit color. The vegetative growth of ornamental chilies requires additional nutrients and the role of microorganisms to obtain optimal growth. This study aims to determine the optimal growth of rainbow chilies using the application of PGPR biological fertilizer, a combination of PGPR biological fertilizer and NPK synthetic fertilizer, as well as a combination of PGPR biological fertilizer and compost organic fertilizer. This research was conducted with a completely randomized design (CRD). The data obtained were then analyzed by ANOVA and continued with the LSD test and Duncan’s test at the 5% test stage. The results showed that the combination treatment of PGPR and compost or PGPR and NPK provided optimal vegetative growth compared to single PGPR treatment.

The role of cyadox and recombinant growth hormone (rGH) on the promotion of growth through epigenetics

2020 ◽  
Author(s):  
Aimei Liu ◽  
Feng Zhu ◽  
Xiaohui Zhu ◽  
Yulian Wang ◽  
Awais Ihsan ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Chromatin Structure ◽  
Dna Methyltransferases ◽  
Promoter Regions ◽  
Recombinant Growth Hormone ◽  
Animal Growth ◽  
Growth Promoting ◽  
The Relationship ◽  
Accessible Chromatin

Abstract Background: Cyadox is an effective growth-promoting antibiotic, which is similar to the role of recombinant growth hormone (rGH). Current studies have shown that cyadox can promote animal growth through altering intestinal microflora, improving protein utilization and increasing protein synthesis. Increasing evidence suggests that epigenetics are also closely related to growth. However, the potential role of epigenetics in the cyadox for growth has not been explored. Results: Here, we used recombinant growth hormone (rGH) and cyadox to study the relationship between growth and changes in epigenetics including DNA methylation, histone modification and chromatin structure. Bisulfite DNA sequencing (BSP) assay suggested that cyadox and rGH treatments increased IGF-1 expression partially by hypomethylation at CpG sites within the promoter region of IGF-1, which was regulated by DNA methyltransferases (DNMTs). We also observed an enrichment of H3K4me3 and H3K27ac at the promoter regions of IGF-1 by ChIP-qPCR assay, which contributed to an increase in IGF-1 transcription. In addition, immunofluorometric assay displayed cellular accessible chromatin structure following the treatment of cyadox and rGH, facilitating the combination of transcription factors and DNA and thus enhancing gene transcription. Conclusions: Taken together, our findings indicated that cyadox and rGH promote cell growth partially through epigenetic changes, providing a prospect for the development of animal growth-promoting drugs in the future.

Sign in / Sign up

Export Citation Format

Share Document