USING NONLINEAR REGRESSION MODELS TO QUANTIFY GERMINATION RESPONSE OF ANNUAL SAVORY (SATUREJA HORTENSIS L.) TO TEMPERATURE AND WATER POTENTIAL

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KHODABAKHSHI AMIRHASAN; SHAHRIARI ALI REZA; KHALILI NAFISEH

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Journal: JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE) Year:2015 | Volume:17 | Issue:1 Page(s): 229-240

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Title

USING NONLINEAR REGRESSION MODELS TO QUANTIFY GERMINATION RESPONSE OF ANNUAL SAVORY (SATUREJA HORTENSIS L.) TO TEMPERATURE AND WATER POTENTIAL

Author(s)

KHODABAKHSHI AMIRHASAN | SHAHRIARI ALI REZA | KHALILI NAFISEH | Issue Writer Certificate

Keywords

BETA MODELQ2

BIOLOGICAL TIMEQ2

CARDINAL TEMPERATURESQ1

DENT-LIKE MODELQ1

SEGMENTED MODELQ1

Abstract

This study was conducted to quantify germination response of annual savory (Satureja hortensis L.) to temperature and water potential. For this purpose, seeds were exposed to different temperature (12, 15, 20, 25, 30, 35, 37 and 40oC) and water potential (zero, -0.1, -0.3, -0.5 and -0.7 MPa) treatments in Seed Research Lab., Gorgan University of Agricultural Sciences and Natural Resources in 2013. Results indicated that temperature and water potential and interacted effects had significant effect on maximum germination percentage, germination rate (reciprocal time to 50 percent germination), and time to 10, 50 and 90 percent germination. Along with water potential decrement, both germination percentage and rate decreased. With temperature increasing to optimum temperature, both germination percentage and rate increased, while it decreased from optimum temperature onward. Assessment of three nonlinear regression models including segmented, dent-like and BETA MODELs revealed that the last one was selected as the superior model. Based on the superior model (Beta), base, optimum and ceiling temperatures were estimated as 7.56, 23.98 and 40oC, respectively. Biological hours for control treatment (zero potential water) was calculated as 91.17 hours. CARDINAL TEMPERATURES were not affected by water potential, but biological hours for germination was delayed as 17.64 hours per each unit water potential increment.

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APA: Copy

KHODABAKHSHI, AMIRHASAN, SHAHRIARI, ALI REZA, & KHALILI, NAFISEH. (2015). USING NONLINEAR REGRESSION MODELS TO QUANTIFY GERMINATION RESPONSE OF ANNUAL SAVORY (SATUREJA HORTENSIS L.) TO TEMPERATURE AND WATER POTENTIAL. JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE), 17(1), 229-240. SID. https://sid.ir/paper/209312/en

Vancouver: Copy

KHODABAKHSHI AMIRHASAN, SHAHRIARI ALI REZA, KHALILI NAFISEH. USING NONLINEAR REGRESSION MODELS TO QUANTIFY GERMINATION RESPONSE OF ANNUAL SAVORY (SATUREJA HORTENSIS L.) TO TEMPERATURE AND WATER POTENTIAL. JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE)[Internet]. 2015;17(1):229-240. Available from: https://sid.ir/paper/209312/en

IEEE: Copy

AMIRHASAN KHODABAKHSHI, ALI REZA SHAHRIARI, and NAFISEH KHALILI, “USING NONLINEAR REGRESSION MODELS TO QUANTIFY GERMINATION RESPONSE OF ANNUAL SAVORY (SATUREJA HORTENSIS L.) TO TEMPERATURE AND WATER POTENTIAL,” JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE), vol. 17, no. 1, pp. 229–240, 2015, [Online]. Available: https://sid.ir/paper/209312/en

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