THE EFFECTS OF EARLY SEASON DROUGHT ON STOMATAL CONDUCTANCE, LEAF-AIR TEMPERATURE DIFFERENCE AND PROLINE ACCUMULATION IN SUGAR BEET GENOTYPES

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MOHAMMADIAN R.; KHOYI F.R.; MOGHADAM MOHAMMAD; GHASEMI GOLEZANI K.; RAHIMIAN H.; SADEGHIAN S.Y.

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Journal: JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY Year:2001 | Volume:3 | Issue:3 Page(s): 181-192

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Title

THE EFFECTS OF EARLY SEASON DROUGHT ON STOMATAL CONDUCTANCE, LEAF-AIR TEMPERATURE DIFFERENCE AND PROLINE ACCUMULATION IN SUGAR BEET GENOTYPES

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Keywords

DROUGHT STRESS

LEAF CONDUCTANCE

PROLINE

SHOOT: ROOT RATIO

SUGAR BEET

TEMPERATURE

Abstract

Limited water for irrigation and the coincidence of early growth of sugar beet (Beta vulgaris L.) with the late growth of winter cereals in the Northeast (NE) of Iran, force farmers, to allocate their limited irrigation water to the cereal crops and thus their sugar beet crop is subjected to an early water stress. Finding cultivars which are able to withstand early water stress without a significant yield reduction is critical to the farmers’ economy. This study was conducted over a two-year period (1998 and 1999) to evaluate the response of nine sugar beet genotypes to drought stress and to determine the crop traits associated with drought resistance. The results showed that stomatal conductance, leaf-air temperature difference and proline accumulation were associated with levels of water stress in sugar beet genotypes. Among these indices, leaf-air temperature difference was a more precise parameter to measure. A negative correlation between D T (leaf –air temperature) and stomatal conductance was found. The correlation coefficients for 1998 and 1999 were -0.87 and -0.58, respectively. There was a positive correlation between D T and proline accumulation in sugar beet genotypes. The correlation coefficients for the 1998 and 1999 experiments were 0.61 and 0.49, respectively. The shoot: root ratio (S:R) measured at the end of the stress period showed that genotypes with a lower S:R often had a greater stomatal conductance. In general, genotypes with a lower S:R at the end of the stress period usually had a greater root dry weight. The correlation coefficients of S: R with root dry weight at the end of the stress period was -0.96 and -0.65 for 1998 and 1999, respectively.

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APA: Copy

MOHAMMADIAN, R., KHOYI, F.R., MOGHADAM, MOHAMMAD, GHASEMI GOLEZANI, K., RAHIMIAN, H., & SADEGHIAN, S.Y.. (2001). THE EFFECTS OF EARLY SEASON DROUGHT ON STOMATAL CONDUCTANCE, LEAF-AIR TEMPERATURE DIFFERENCE AND PROLINE ACCUMULATION IN SUGAR BEET GENOTYPES. JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST), 3(3), 181-192. SID. https://sid.ir/paper/529260/en

Vancouver: Copy

MOHAMMADIAN R., KHOYI F.R., MOGHADAM MOHAMMAD, GHASEMI GOLEZANI K., RAHIMIAN H., SADEGHIAN S.Y.. THE EFFECTS OF EARLY SEASON DROUGHT ON STOMATAL CONDUCTANCE, LEAF-AIR TEMPERATURE DIFFERENCE AND PROLINE ACCUMULATION IN SUGAR BEET GENOTYPES. JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST)[Internet]. 2001;3(3):181-192. Available from: https://sid.ir/paper/529260/en

IEEE: Copy

R. MOHAMMADIAN, F.R. KHOYI, MOHAMMAD MOGHADAM, K. GHASEMI GOLEZANI, H. RAHIMIAN, and S.Y. SADEGHIAN, “THE EFFECTS OF EARLY SEASON DROUGHT ON STOMATAL CONDUCTANCE, LEAF-AIR TEMPERATURE DIFFERENCE AND PROLINE ACCUMULATION IN SUGAR BEET GENOTYPES,” JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY (JAST), vol. 3, no. 3, pp. 181–192, 2001, [Online]. Available: https://sid.ir/paper/529260/en

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