Effect of ecological factors on germination of horse purslane (Trianthema portulacastrum)

Tanveer, Asif; Mumtaz, Komal; Javaid, Muhammad Mansoor; Chaudhry, Muhammad Naeem; Balal, Rashad Mukhtar; Khaliq, Abdul

doi:10.1590/s0100-83582013000300011

Cited by 14 publications

(10 citation statements)

References 20 publications

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“…tenuifolius (rapid reduction after -0.2 MPa, 50% by -0.38 MPa) [ 13 ]. By contrast, Trianthema portulacastrum (horse purslane) was less affected by moisture stress, with a 50% reduction in maximum germination at -0.50 MPa [ 6 ]. This indicates that in a situation of competition between these weeds, Trianthema portulacastrum would be the least affected by lack of moisture than all the other species, but S .…”

Section: Resultsmentioning

confidence: 99%

“…Environmental factors, such as temperature, light, pH, osmotic and salt stress affect the germination or emergence of weeds [ 6 ], [ 7 ], [ 8 ], [ 9 ]. Some weeds have a narrow tolerance range, while others are able to germinate over a wide range of temperatures [ 10 ], [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Salinity may affect seed germination according to species, genotypes and environmental conditions [ 14 ] and germination may be reduced when salt accumulation exceeds a threshold level [ 15 ], [ 16 ]. Soil pH also affects weed seed germination, although some weeds can tolerate a wide range of pH levels [ 6 ]. Seed burial depth is an important factor that may influence the seed germination or seedling emergence, by affecting light, moisture and temperature [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of environmental factors on the germination and emergence of Salvia verbenaca L. cultivars (verbenaca and vernalis): An invasive species in semi-arid and arid rangeland regions

et al. 2018

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Salvia verbenaca (wild sage) is a commonly cultivated herbal medicine plant, which is native to the Mediterranean climate regions of Europe, Africa, Asia and the Middle East. However, it has become an invasive species in semi-arid and arid regions of southern Australia. Two varieties are present in this region, var. verbenaca and var. vernalis, each of which can be distinguished by differences in morphology and flowering period. Following trials to determine the optimum temperate regime for germination and response to light and dark, seeds of both varieties were tested for their response to variations in pH, moisture stress, salinity, and burial depth. The temperature and light trial was carried out using three different temperature regimes; 30/20°C, 25/15°C and 20/12°C, and two light regimes; 12 hours light/12 hours dark and 24 hours dark, with var. vernalis responding to relatively higher temperatures than var. verbenaca. The germination rate of neither species was significantly inhibited by complete darkness when compared to rates under periodic light exposure. Both varieties germinated at near optimum rates strongly to very strongly in all pH buffer solutions, from pH 5 to pH 10, but they responded most strongly at neutral pH. Var. vernalis showed slightly more tolerance to reduced moisture availability, moderate to strong salinity, and burial depth, compared to var. verbenaca. However, even a fairly shallow burial depth of 2 cm completely inhibited germination of both varieties. Thus, in circumstances where both varieties are present in a soil seedbank, var. vernalis could be expected to establish in more challenging conditions, where moisture is limited and salinity is ‘moderate to high’, implying that it is a more serious threat for invasive weed in conditions where crop plants are already challenged.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of environmental factors on the germination and emergence of Salvia verbenaca L. cultivars (verbenaca and vernalis): An invasive species in semi-arid and arid rangeland regions

et al. 2018

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“…Moreover, B. excelsa seeds present physiological dormancy, which results in slow, irregular, and low percentages of germination (Kainer et al, 1999a;Auca et al, 2018). Seed burial depth and food reserves within seeds are the most important factors affecting seed germination (Tanveer et al, 2013;Baskin & Baskin, 2014).…”

Section: Introductionmentioning

confidence: 99%

Seedling production of Bertholletia excelsa in response to seed origin and position inside fruit

Dionísio

Auca

Schwartz

et al. 2019

Agraria

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Bertholletia excelsa, known as Brazil nut, is an economically valuable tree species from the Amazon. Seeds of B. excelsa figure as one of the most important non-timber forest products in Bolivia, Brazil, and Peru. These seeds, however, have physiological dormancy, which makes the germination slow, irregular, and often in low percentages. Such biological feature represents a bottleneck to the production of high quality seedlings. In an experiment performed in Puerto Maldonado, Peru, ten fruits were collected per individual in 15 trees of B. excelsa in each of the two areas: an experimental planting and a native forest. Several variables regarding fruit biometry, germination, initial growth, and seedlings quality indexes were measured in order to compare B. excelsa seedlings produced by seeds from two areas and also regarding the lower and upper seed position inside the fruit. Both fruit length and diameter presented low variation and most of the fruits had flat shape. Seeds were more abundant in the lower position (mean = 12.9 ± 2.2) than in the upper position (mean = 6.5 ± 2.1) inside the fruit. Considering the total number of seeds per fruit, the means were 19.4 ± 3.2 and 17.5 ± 3.7 for planted and native forest, respectively. Complete germination did not differ between areas (F 1, 56 = 1.945, p = 0.169). Seedlings produced with seeds from planted and from the lower position inside the fruit presented higher quality indexes.

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“…Similarly, Tanveer et al . () reported that high infestation of Trianthema spp. may result in complete crop failure.…”

Section: Introductionmentioning

confidence: 99%

Consequences of narrow crop row spacing and delayed Echinochloa colona and Trianthema portulacastrum emergence for weed growth and crop yield loss in maize

et al. 2014

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Summary Echinochloa colona and Trianthema portulacastrum are weeds of maize that cause significant yield losses in the Indo‐Gangetic Plains. Field experiments were conducted in 2009 and 2010 to determine the influence of row spacing (15, 25 and 35 cm) and emergence time of E. colona and T. portulacastrum (0, 15, 25, 35, 45 and 55 days after maize emergence; DAME) on weed growth and productivity of maize. A season‐long weed‐free treatment and a weedy control were also used to estimate maize yield and weed seed production. Crop row spacing as well as weed emergence time had a significant influence on plant height, shoot biomass and seed production of both weed species and grain yield of maize in both years. Delay in emergence of weeds resulted in less plant height, shoot biomass and seed production. However, increase in productivity of maize was observed by delay in weed emergence. Likewise, growth of both weed species was less in narrow row spacing (15 cm) of maize, as compared with wider rows (25 and 35 cm). Maximum seed production of both weeds was observed in weedy control plots, where there was no competition with maize crop and weeds were in rows 35 cm apart. Nevertheless, maximum plant height, shoot biomass and seed production of both weed species were observed in 35 cm rows, when weeds emerged simultaneously with maize. Both weed species produced only 3–5 seeds per plant, when they were emerged at 55 DAME in crop rows spaced at 15 cm. Infestation of both weeds at every stage of crop led to significant crop yield loss in maize. Our results suggested that narrow row spacing and delay in weed emergence led to reduced weed growth and seed production and enhanced maize grain yield and therefore could be significant constituents of integrated weed management strategies in maize.

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Effect of ecological factors on germination of horse purslane (Trianthema portulacastrum)

Cited by 14 publications

References 20 publications

Effect of environmental factors on the germination and emergence of Salvia verbenaca L. cultivars (verbenaca and vernalis): An invasive species in semi-arid and arid rangeland regions

Effect of environmental factors on the germination and emergence of Salvia verbenaca L. cultivars (verbenaca and vernalis): An invasive species in semi-arid and arid rangeland regions

Seedling production of Bertholletia excelsa in response to seed origin and position inside fruit

Consequences of narrow crop row spacing and delayed Echinochloa colona and Trianthema portulacastrum emergence for weed growth and crop yield loss in maize

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