Allelopathy in weed management: A critical review

Sangeetha, C.; Baskar, P.

doi:10.5897/ajar2013.8434

Cited by 32 publications

(7 citation statements)

References 91 publications

(90 reference statements)

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“…Although amaranth plants are known for high allelopathic activity (Prinsloo & Du Plooy, 2018), they are also used as a quite sensitive bioassay species to evaluate the allelopathic activity of other plants. For example, Sangeetha & Baskar (2015) reported that Helianthus annuus L., Ageratum conyzoides L., and Fagopyrum esculentum Moench strongly inhibited the growth of amaranth plants. However, in our study, we observed the opposite -aqueous extracts of S. georgicouncinata stimulated root growth of amaranth sprouts.…”

Section: Discussionmentioning

confidence: 99%

Allelopathic potential and cytostatic activity of Antarctic moss Sanionia georgicouncinata (Amblystegiaceae)

Dziuba¹,

Liubinska²,

Khoyetskyy

et al. 2021

Biosys. divers.

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From the first half of the XX century, the maritime Antarctic was a region with high regional warming rates. At the beginning of the XXI century, regional warming strongly slowed down, but during the next twenty years the near-surface temperatures and mean annual precipitation at the Antarctic Peninsula will most probably increase. Higher temperatures and precipitation make the conditions in the maritime Antarctic more favourable for plants, including invasive species. Moreover, the increasing number of Antarctic tourists unintentionally transport thousands of seeds to the Antarctic on their clothes and equipment. In such circumstances, it is important to evaluate possible defensive mechanisms of native plant species, including their allelopathic potential. The objective of this study was to evaluate the allelopathic potential and cytostatic activity of Sanionia georgicouncinata. This species is widespread in the maritime Antarctic and is one of the most abundant moss species on the Argentine Islands (Wilhelm Archipelago). Seeds of cucumber Cucumis sativus, radish Raphanus raphanistrum subsp. sativus, wheat Triticum vulgare, and amaranth Amaranthus paniculatus were used as bioassay species. Fresh green biomass of S. georgicouncinata was used to prepare aqueous extracts with 1 : 10, 1 : 50, and 1 : 100 plant to water ratios. The average root length of wheat sprouts and cucumber sprouts in distilled water did not differ significantly from those in plant extracts. The root length of radish sprouts in 1 : 50 plant extract was significantly shorter than in distilled water. Meanwhile, in 1 : 50 and 1 : 100 water extracts, roots of amaranth plants were significantly longer than in water. The number of lateral roots of cucumber sprouts in water and studied aqueous extracts varied from 1 to 6 with medians from 3 to 4. The medians of control (distilled water) and sample groups (aqueous extracts) did not differ significantly, but only 38.1 ± 6.1% of cucumber sprouts developed lateral roots in the 1 : 10 aqueous extract of S. georgicouncinata, and even less – 28.3 ± 7.5% in the 1 : 50 aqueous extract. The results of this study show that the allelopathic potential of S. georgicouncinata is low. However, a significant cytostatic activity of the studied extracts shows that this species may still affect other plants and animals. Further research is needed to evaluate the impact of the studied extracts on root growth and germination of the invasive plants, particularly Poa annua.

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Section: Discussionmentioning

confidence: 99%

Allelopathic potential and cytostatic activity of Antarctic moss Sanionia georgicouncinata (Amblystegiaceae)

Dziuba¹,

Liubinska²,

Khoyetskyy

et al. 2021

Biosys. divers.

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“…Flavonoids secreted by the roots of gramineous crops, such as corn, wheat, and rice, attract rhizobia, promoting nodulation, and nitrogen fixation in legumes. Moreover, the roots secrete momilactone B diterpenoid, benzoxazinoids, coumaric acid, and cinnamic acid, which can also inhibit weed growth, and prevent soybean phytophthora blight and watermelon fusarium wilt to coordinate the growth of surrounding plants and microorganisms (Hao et al, 2010; Li et al, 2016; Liu et al, 2017; Sangeetha & Baskar, 2015; Zhang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

CsBPC2 is a key regulator of root growth and development

Meng

et al. 2023

Physiologia Plantarum

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BASIC PENTACYSTEINE (BPCs) transcription factors are important regulators of plant growth and development. However, the regulatory mechanism of BPC2 in roots remains unclear. In our previous study, we created Csbpc2 cucumber mutants by the CRISPR/Cas9 system, and our studies on the phenotype of Csbpc2 mutants showed that the root growth was inhibited compared with wide‐type (WT). Moreover, the surface area, volume and number of roots decreased significantly, with root system architecture changing from dichotomous branching to herringbone branching. Compared with WT, the leaf growth of the Csbpc2 mutants was not affected. However, the palisade and spongy tissue were significantly thinner, which was not beneficial for photosynthesis. The metabolome of root exudates showed that compared with WT, amino acids and their derivatives were significantly decreased, and the enriched pathways were mainly regulated by amino acids and their derivatives, indicating that knockout of CsBPC2 mainly affected the amino acid content in root exudates. Importantly, transcriptome analysis showed that knockout of CsBPC2 mainly affected root gene expression. Knockout of CsBPC2 significantly reduced the gene expression of gibberellins synthesis. However, the expression of genes related to amino acid synthesis, nitrogen fixation and PSII‐related photosynthesis increased significantly, which may be due to the effect of knocking out CsBPC2 on gibberellins synthesis, resulting in the inhibition of seedling growth, thus forming negative feedback regulation. Generally, we showed for the first time that BPC2 is a key regulator gene of root growth and development, laying the foundation for future mechanisms of BPC2 regulation in roots.

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“…Allelopathy is a biological phenomenon referring to either positive and negative or direct and indirect effects of a plant species, fungi or microorganisms on other species by creating chemical compounds (allelochemicals) released into the environment (Tesio et al, 2010;Lehoczky et al, 2011;Viddotto et al, 2013). Allelochemicals which combat or remove plant species are paid special attention for their agricultural application as selective natural herbicides (Vyvyan, 2002;Sangeetha and Bashar, 2015). Ragweed generates allelochemicals which can be found in all parts of plants, and most common compounds with the allelopathic potential are terpenes and phenols (Seigler, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Allelopathic effects of ragweed on other plant species should be further accounted for Buzhdygan and Baglei, 2016), although its inhibition effects on crops have been documented (Csiszár, 2009;Lehoczky et al, 2011;Sangeetha and Bashar, 2015;Bonea and sar., 2018). Vidotto et al (2013) deduced that extracts isolated from ragweed roots and leaves inhibited the growth of tomato, lettuce and wheat.…”

Section: Introductionmentioning

confidence: 99%

ALLELOPATHIC EFFECTS OF RAGWEED ON CORN (Zea mays L.) AND WHEAT (Triticum aestivum L.)

Maksimović,

Jotić

2020

ASB

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Ambrosia artemisifolia (ragweed) is an invasive plant species with severe allergenic effects which quickly detects favorable growth conditions and represents a threat to the quality of plant communities. There are still unanswered questions to the allelopathic effects of ragweed on other species, which further complicates the understanding of its compatibility with other plants in both natural and agricultural environment. The paper monitors the allelopathic effects of the aqueous extract isolated from dry ragweed leaves (10, 5, 2.5 and 1.25%) on the germination and growth of corn and wheat. The aquaeous ragweed extracts reduced the germination of corn and wheat down to 70%. The seedling length was inhibited, especially in high concentrations. Wheat appeared to be more tolerant to the extract effect. Corn suffered a larger inhibition effect in terms of root length and seedlings, which suggested that this species was more sensitive. The obtained results imply that the ragweed should be combated in a timely manner in order to avoid its inhibitory effects on the indicator crops.

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Allelopathy in weed management: A critical review

Cited by 32 publications

References 91 publications

Allelopathic potential and cytostatic activity of Antarctic moss Sanionia georgicouncinata (Amblystegiaceae)

Allelopathic potential and cytostatic activity of Antarctic moss Sanionia georgicouncinata (Amblystegiaceae)

CsBPC2 is a key regulator of root growth and development

ALLELOPATHIC EFFECTS OF RAGWEED ON CORN (Zea mays L.) AND WHEAT (Triticum aestivum L.)

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