Effects of Environmental Factors on Seed Germination and Emergence of Velvetleaf (Abutilon theophrasti)

Xiong, Rc.; Ying-jie, MA; Wu, H.; Jiang, Wl.; Ma, Xy.

doi:10.1590/s0100-83582018360100122

Cited by 5 publications

(5 citation statements)

References 45 publications

(68 reference statements)

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“…In the Yellow River cotton production region in China, the emergence of black nightshade seedlings starts in late April and continues through to mid-October, coinciding with the cotton growing period (Ma et al, 2012). Such an emergence pattern is well supported by the average monthly temperatures of 15.2 o C and 15.9 o C in April and October, respectively, based on the climatic data between 2011 and 2015 in this region (Xiong et al, 2018).…”

Section: Alternating Temperature and Lightsupporting

confidence: 62%

“…Seed germination was evaluated in incubators under six fluctuating temperatures of 15/5, 20/10, 25/15, 30/20, 35/25, and 40/30 o C. The reason for these temperature regimes was that the difference between minimum temperature and maximum temperature in March to November during recent years in the region being approximately 10 o C (Xiong et al, 2018). A set of petri dishes in each temperature was wrapped in two layers of aluminum foil to study seed germination in the dark, and the number of germinated seeds was counted once at 10 DAS.…”

Section: Alternating Temperature and Lightmentioning

confidence: 99%

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Germination of Solanum nigrum L. (Black Nightshade) in Response to Different Abiotic Factors

Dong

et al. 2020

Planta daninha

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ABSTRACT: Solanum nigrum L. (black nightshade), an annual to short-lived perennial weed, has become a problem weed in farming systems in central China. Laboratory and greenhouse experiments were conducted to examine the influence of various abiotic factors on seed germination of black nightshade to develop effective weed control programs. Seeds germinated at a range of constant temperatures from 15 to 30 oC, but no germination occurred at temperatures below 10 oC or above 35 oC. Seeds also germinated at alternating temperature regimes from 15/5 to 40/30 oC, with maximum germination (> 93.5%) at the alternating temperatures of 25/15 and 30/20 oC. Germination decreased as osmotic potential became more negative, and no germination was observed at ≤ -0.8 MPa. Moreover, germination was reduced by saline and alkaline stresses and no germination occurred at ≥ 200 mM NaCl or ≥ 150 mM NaHCO3 concentrations. Seed germination was not significantly affected by pH values from 5 to 10. Seedling emergence was significantly affected by burial depth with maximum emergence (93.1%) at 1 cm depth.

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Section: Alternating Temperature and Lightsupporting

confidence: 62%

Section: Alternating Temperature and Lightmentioning

confidence: 99%

Germination of Solanum nigrum L. (Black Nightshade) in Response to Different Abiotic Factors

Dong

et al. 2020

Planta daninha

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“…Conversely, seedlings are usually equipped only with an elongated embryonic root and root hairs. Because most seedlings emerge on or near the soil surface 7 – 11 , they are prone to damage by unfavourable conditions such as exposure of the root after small-scale soil disruptions (e.g., rainfall) and other mechanical impacts on the soil surface.…”

Section: Introductionmentioning

confidence: 99%

Root hairs enhance Arabidopsis seedling survival upon soil disruption

Choi

Cho

2019

Sci Rep

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Root hairs form a substantial portion of the root surface area. Compared with their nutritional function, the physical function of root hairs has been poorly characterised. This study investigates the physical role of root hairs of Arabidopsis thaliana seedlings in interaction of the root with water and soil and in plant survival upon soil disruption. Five transgenic lines with different root hair lengths were used to assess the physical function of root hairs. Upon soil disruption by water falling from a height (mimicking rainfall), long-haired lines showed much higher anchorage rates than short-haired lines. The root-pulling test revealed that a greater amount of soil adhered to long-haired roots than to short-haired roots. When seedlings were pulled out and laid on the soil surface for 15 d, survival rates of long-haired seedlings were higher than those of short-haired seedlings. Moreover, the water holding capacity of roots was much greater among long-haired seedlings than short-haired seedlings. These results suggest that root hairs play a significant role in plant survival upon soil disruption which could be fatal for young seedlings growing on thin soil surface with a short primary root and root hairs as the only soil anchoring system.

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“…However, pH values from 5 to 9 had no effect on seed germination. The maximum seedling emergence (78.1-85.6%) occurred at 1-4 cm depth [45].…”

Section: Seed Dormancy In Response To Stresses and Herbicidesmentioning

confidence: 92%

Weed Seed Dormancy: The Ecophysiology and Survival Strategies

Qasem¹

2020

Seed Dormancy and Germination

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This chapter deals with seed dormancy of agricultural weeds, its definitions and types from the physiological and ecological point of view, and physiological and ecological factors inducing dormancy in different weed species. The role of different environmental factors, agricultural practices including herbicides application, selection pressure, and seasonal dormancy, weed density and population regulation, seed phenology, polymorphism, and modifications were emphasized. Factors induce or terminate dormancy and enhance seed germination and dormancy breaking have been mentioned and evaluated in addition to the ecological importance of seed dormancy and herbicide resistance, genetic bases of dormancy, and molecular studies were presented. The role of allelochemicals, stresses, and dormancy and their effects on seed longevity and germination regulation were thoroughly discussed. Dormancy breaking under laboratory conditions, role of plant hormones and other chemicals, and dormancy management in the field were reviewed in addition to information on seed dormancy/longevity and germination stimulants. Seed germination stimulants and inhibitors of parasitic weed and seed dormancy as a weed survival strategy were presented and discussed.

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Effects of Environmental Factors on Seed Germination and Emergence of Velvetleaf (Abutilon theophrasti)

Cited by 5 publications

References 45 publications

Germination of Solanum nigrum L. (Black Nightshade) in Response to Different Abiotic Factors

Germination of Solanum nigrum L. (Black Nightshade) in Response to Different Abiotic Factors

Root hairs enhance Arabidopsis seedling survival upon soil disruption

Weed Seed Dormancy: The Ecophysiology and Survival Strategies

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