THE ROLE OF CALCIUM IONS IN CIRCADIAN LEAF MOVEMENTS IN LEGUM PLANTS

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CHALAVI V.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: Journal of Rangeland Year:2008 | Volume:1 | Issue:4 Page(s): 401-411

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Title

THE ROLE OF CALCIUM IONS IN CIRCADIAN LEAF MOVEMENTS IN LEGUM PLANTS

Author(s)

CHALAVI V. | Issue Writer Certificate

Keywords

PULVINUSQ3

EXTENSORQ3

FLEXORQ3

LEAF MOVEMENTQ2

RHYTHMQ3

CIRCADIANQ3

CALCIUMQ3

PHASEOLUS VULGARISQ3

RADIOACTIVEQ3

Abstract

Legume plants, due to their distinctive eco physiological characteristics, could endure environmental stresses, and do have important roles in sustainable pastures production, recreation and improvement. LEAF MOVEMENT of legume plants is turgor regulated, and osmotic cally active fluxes of ions between EXTENSOR and FLEXOR of PULVINUS cause this movement. To determine the role of CALCIUM ions in CIRCADIAN LEAF MOVEMENTs of bush bean plants (Phaseolus vulgaris L. cv.Provider), a radiotracer technique experiment using 45Ca ions were employed.Measurements were taken during CIRCADIAN LEAF MOVEMENTs, and samples were taken from different parts of the leaf. The 45Ca activity reduced from leaf base PULVINUS to leaf tip. The PULVINUS had the highest activity, while the leaf tip had the lowest. The ratio of 45Caactivity inside EXTENSOR to that of FLEXOR (Ex/Fl) increased, while the midrib-petiole angle, as an indicator of LEAF MOVEMENT, decreased with time. The relationship between 45Ca activity inside EXTENSOR and that of FLEXOR was highly significant (r=0.97, p<0.001).The relation between midrib-petiole angle and Ex/Fl 45Ca activity ratio was found also significant (r=0.65, P<0.05). In conclusion, it was found that calcitim ions accumulation is opposite to the fluxes of osmotic ally active ions and water movement. CALCIUM ions accumulate at less negative water potential side of the PULVINUS.

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References

THE EFFECT OF LEAF MOVEMENT ON LEAF GAS EXCHANGE AND INSTANTANEOUS LEAF WATER-USE EFFICIENCY FOR LEGUMINOUS SPECIES

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APA: Copy

CHALAVI, V.. (2008). THE ROLE OF CALCIUM IONS IN CIRCADIAN LEAF MOVEMENTS IN LEGUM PLANTS. RANGELAND, 1(4), 401-411. SID. https://sid.ir/paper/136206/en

Vancouver: Copy

CHALAVI V.. THE ROLE OF CALCIUM IONS IN CIRCADIAN LEAF MOVEMENTS IN LEGUM PLANTS. RANGELAND[Internet]. 2008;1(4):401-411. Available from: https://sid.ir/paper/136206/en

IEEE: Copy

V. CHALAVI, “THE ROLE OF CALCIUM IONS IN CIRCADIAN LEAF MOVEMENTS IN LEGUM PLANTS,” RANGELAND, vol. 1, no. 4, pp. 401–411, 2008, [Online]. Available: https://sid.ir/paper/136206/en

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