INVESTIGATING THE GERMINATION RESPONSE OF TWO ECHINOCHLOA SPECIES TO TEMPERATURE AND PHOTOPERIOD WITH EMPHASIS ON INVASIVENESS

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MOHAMMADVAND ELMIRA; KOOCHEKI ALIREZA; NASSIRI MAHALLATI MEHDI; SHAHDI KUMLEH ABBAS

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Journal: Iranian Journal of Field Crop Science Year:2015 | Volume:45 | Issue:4 Page(s): 639-648

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Title

INVESTIGATING THE GERMINATION RESPONSE OF TWO ECHINOCHLOA SPECIES TO TEMPERATURE AND PHOTOPERIOD WITH EMPHASIS ON INVASIVENESS

Author(s)

MOHAMMADVAND ELMIRA | KOOCHEKI ALIREZA | NASSIRI MAHALLATI MEHDI | SHAHDI KUMLEH ABBAS | Issue Writer Certificate

Keywords

CARDINAL TEMPERATUREQ1

GERMINATION REQUIREMENTQ2

ECHINOCHLOA CRUS-GALLIQ2

ECHINOCHLOA ORYZOIDESQ2

Abstract

This experiment, conducted to examine the effects of temperature and photoperiod on seed germination of watergrass (Echinochlo aoryzoides) as a new-introduced and barnyardgrass (E. crus-galli) as a common weed species in rice fields of Guilan province. This study was consisted of two separate experiments. At the first study, germination responses of two species to different temperatures (10, 15, 20, 25, 30, 35, 40 and 45oC) were evaluated and the CARDINAL TEMPERATUREs were estimated. For the second study, the photoperiod effects (0.24, 4.20, 8.1, 10.14, 12.12, 14.10, 16.8, 20.4, and 24.0 hours light/dark) under two constant temperatures of 25 and 30oC were intended. The results indicated that, for the both species, the highest final germination, maximum germination rate, and nil germination were observed in 25 to 30, 30 and 40 °C, respectively. At low temperatures, greater germination was recorded for barnyardgrass compared to watergrass. The minimum, optimum and maximum germination temperatures were 9.6, 31, and 45.5°C for barnyardgrass, and 10.5, 31.4, and 45.6oC for watergrass, respectively. Despite the occurrence of some germination in complete darkness, increased light exposure promoted the germination. Short photoperiods promoted germination more in barnyardgrass rather than watergrass. Increasing temperature from 25 to 30°C, caused partial reduction in light requirement for germination, especially in barnyardgrass. Overall, it seems that the new-introduced species compared with the common species needs higher temperatures and is more tolerant to different photoperiods for germination. These characteristics can be enumerated as competitive advantages for this species, especially under the early season higher mean temperature scenarios.

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APA: Copy

MOHAMMADVAND, ELMIRA, KOOCHEKI, ALIREZA, NASSIRI MAHALLATI, MEHDI, & SHAHDI KUMLEH, ABBAS. (2015). INVESTIGATING THE GERMINATION RESPONSE OF TWO ECHINOCHLOA SPECIES TO TEMPERATURE AND PHOTOPERIOD WITH EMPHASIS ON INVASIVENESS. IRANIAN JOURNAL OF FIELD CROP SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), 45(4), 639-648. SID. https://sid.ir/paper/153596/en

Vancouver: Copy

MOHAMMADVAND ELMIRA, KOOCHEKI ALIREZA, NASSIRI MAHALLATI MEHDI, SHAHDI KUMLEH ABBAS. INVESTIGATING THE GERMINATION RESPONSE OF TWO ECHINOCHLOA SPECIES TO TEMPERATURE AND PHOTOPERIOD WITH EMPHASIS ON INVASIVENESS. IRANIAN JOURNAL OF FIELD CROP SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)[Internet]. 2015;45(4):639-648. Available from: https://sid.ir/paper/153596/en

IEEE: Copy

ELMIRA MOHAMMADVAND, ALIREZA KOOCHEKI, MEHDI NASSIRI MAHALLATI, and ABBAS SHAHDI KUMLEH, “INVESTIGATING THE GERMINATION RESPONSE OF TWO ECHINOCHLOA SPECIES TO TEMPERATURE AND PHOTOPERIOD WITH EMPHASIS ON INVASIVENESS,” IRANIAN JOURNAL OF FIELD CROP SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), vol. 45, no. 4, pp. 639–648, 2015, [Online]. Available: https://sid.ir/paper/153596/en

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