Factors Affecting the Germination of Tall Morningglory (<i>Ipomoea purpurea</i>)

Singh, Megh; Ramirez, Analiza H. M.; Sharma, S. D.; Jhala, Amit J.

doi:10.1614/ws-d-11-00106.1

Cited by 45 publications

(30 citation statements)

References 32 publications

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“…Germination of both seed types of T. arvensis in the presence or absence of light was the same and was not affected by light. Similar to our results, the insensibility of weed seeds to light for germination (nonphotoblastic) has been reported for many other species, such as Centaurea balsamita Lam (Nosratti et al 2017c), Myagrum perfoliatum (Honarmand et al 2016), Sophora alopecuroides (Nosratti et al 2017a), Solanum ptycanthum Dun (Zhou et al 2005) and Ipomoea purpurea Roth (Singh et al 2012).…”

Section: Discussionsupporting

confidence: 91%

Variations in the germination characteristics in response to environmental factors between the hairy and spiny seeds of hedge parsley (Torilis arvensis Huds.)

Payamani

Nosratti

Amerian

2018

Weed Biology and Management

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Torilis arvensis Huds. produces two types of mericarps, spiny and hairy (referred to as seeds hereafter), but little information is available on their germination behavior. Therefore, the purpose of this study was to determine the different germination characteristics of hairy and spiny seeds in T. arvensis in response to environmental factors. Both seed types were dormant at harvesting, but the spiny type had a deeper dormancy level and required a more prolonged after‐ripping period. In general, T. arvensis seed germination and seedling emergence responses to examined factors were similar between the two seed types. The highest germination percentage was observed in pH 7. Germination was the highest at a temperature of 20°C. Light did not affect seed germination. T. arvensis was sensitive to osmotic stress induced by NaCl or PEG6000. No seedlings emerged when the seeds were buried at soil depth of 6 cm and deeper soil depths. The results indicate that T. arvensis has the potential to spread into more areas devoted to Apiaceae crops in Iran. Tillage would be beneficial to its effective control in these crops.

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Section: Discussionsupporting

confidence: 91%

Variations in the germination characteristics in response to environmental factors between the hairy and spiny seeds of hedge parsley (Torilis arvensis Huds.)

Payamani

Nosratti

Amerian

2018

Weed Biology and Management

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“…This may be the main reason for explaining why C. cardunculus is most frequent in drained than flooded soils (CABI, ). The capacity to tolerate flooding is a highly species‐specific trait, and C. cardunculus showed less tolerance than some species such as Ipomea purpurea (L.) Roth (Singh et al ., ) and Agrostis stolonifera L. (Zapiola & Mallory‐Smith, ). For instance, the latter keeps its capacity to germinate over a 17‐week exposure period.…”

Section: Discussionmentioning

confidence: 99%

Understanding dormancy breakage and germination ecology of Cynara cardunculus (Asteraceae)

et al. 2018

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Summary Cynara cardunculus is a troublesome weed in temperate grazing lands. Cynara cardunculus achenes are usually dormant at dispersal and require alternating temperatures to terminate dormancy and germinate. Laboratory and glasshouse experiments were conducted to determine (i) the treatments able to terminate dormancy and (ii) the effect of environmental factors and agronomic practices on germination and emergence of non‐dormant (dry after‐ripened) achenes. Scarification, hydrogen peroxide and sodium hypochlorite promoted germination of dormant achenes. Dry after‐ripening and cold stratification were tested in two different populations. Dormancy of both populations was released from dormancy by dry after‐ripening. In contrast, cold stratification allowed dormancy release in just one of the populations, while the other was induced into secondary dormancy. Germination of non‐dormant (dry after‐ripened) achenes was maximum in a range of temperatures from 10 to 20°C and was inhibited at higher temperatures. Reduction of osmotic potential below −0.6 MPa led to a decrease in final germination. These results explain synchronic emergence of C. cardunculus seedlings in autumn after dormancy release during summer. Maximum seedling emergence was close to 60% at soil depths of 1 cm and only decreased as depth increased over 6 cm. In contrast, seedling emergence was not reduced by the presence of cover residues, while a flooding duration of 21 days was required to suppress emergence significantly. These results suggest that the deep burial of achenes and agronomic practices that take advantage of synchronic emergence of achenes could be useful tools leading to better long‐term management of C. cardunculus.

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“…In contrast, other species are known to be sensitive to pH. For instance, Ipomoea purpurea (Singh et al, 2012) did not germinate under extreme pH conditions.…”

Section: Effect Of Phmentioning

confidence: 89%

ENVIRONMENTAL FACTORS AFFECTING SEED GERMINATION OF COMMON TEASEL (Dipsacus fullonum)

Daddario¹,

Bentivegna²,

Tucat³

et al. 2017

Planta daninha

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-Common teasel is a widespread, invasive species that has been introduced in Buenos Aires province, Argentina, where it alters the species composition of protected areas and native grasslands. A better understanding of seed germination behavior is essential for predicting its invasion potential in new areas and would be useful for developing effective management strategies. This research, conducted under laboratory conditions, evaluated the influence of several environmental factors such as pH, constant temperature, osmotic stress, salt stress and dry storage, on germination and rate of germination of common teasel seed. Between-year variation in germination responses was also examined. Seed germination was not affected by different pH levels. Although common teasel seeds germinated over a range of temperatures from 6 to 36 o C, the optimum temperature was 22 o C. Common teasel seed germination showed moderate tolerance to osmotic stress and a relatively high tolerance to salt stress. No seed germination was observed at -1 MPa and 640 mM of osmotic potential and salt concentration, respectively. Seed germination remained high (> 90%) after all the dry storage treatments. Besides, the response of seeds to germination parameters showed between-year variation. It was shown that common teasel is able to germinate over a broad range of environmental conditions. This capacity would explain, at least partially, why this species is so widely distributed and its great potential to invade new areas. Palavras-chave: planta daninha invasora, armazenamento a seco, estresse osmótico, pH, concentração de sal, temperatura. Keywords

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Factors Affecting the Germination of Tall Morningglory (Ipomoea purpurea)

Cited by 45 publications

References 32 publications

Variations in the germination characteristics in response to environmental factors between the hairy and spiny seeds of hedge parsley (Torilis arvensis Huds.)

Variations in the germination characteristics in response to environmental factors between the hairy and spiny seeds of hedge parsley (Torilis arvensis Huds.)

Understanding dormancy breakage and germination ecology of Cynara cardunculus (Asteraceae)

ENVIRONMENTAL FACTORS AFFECTING SEED GERMINATION OF COMMON TEASEL (Dipsacus fullonum)

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