THE EFFECT OF WATER STRESS ON DRY WEIGHT AND PHOTOSYNTHETIC PIGMENTS IN TWO SAINFOIN SPECIES

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RAMAK P.; KHAVARINEZHAD RAMEZAN ALI; HEYDARI SHARIFABAD H.; RAFIEI MASOUD; KHADEMI K.

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Journal: Iranian Journal of Rangelands and Forests Plant Breeding and Genetic Research Year:2006 | Volume:14 | Issue:2 (24) Page(s): 80-91

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Title

THE EFFECT OF WATER STRESS ON DRY WEIGHT AND PHOTOSYNTHETIC PIGMENTS IN TWO SAINFOIN SPECIES

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Keywords

WATER STRESSQ3

SAINFOINQ3

FIELD CAPACITY (FC)Q3

PHOTOSYNTHETIC PIGMENT AND RELATIVE GROWTH RATEQ3

Abstract

Effect of WATER STRESS on dry weight and photosynthetic pigments in two SAINFOIN species (Onobrychis radiata & Onobrychis viciifolia) was surveyed in a factorial experiment based on a randomized complete block design with 4 replications. The plants under study were grown in a greenhouse environment with the maximum temperature of 38oC and the minimum temperature of 14oC. Forty days after cultivation, both species were put under water deficit stress based on the subtraction farm 75% field capacity (FC) and 50% FC, and samplings were carried out in germination and growth stages, with irrigation level of 100% FC being taken as control. In both types, water deficiency tension resulted in decreased relative growth rate (RGR), leaf area ratio (LAR) and relative leaf growth rate (RLGR). The measurement of imposed tension indices showed that Onobrychis viciifolia underwent the greatest tension in such a way that this species withheld at 50% FC tension level. The ratio of root to shoot (R/S), length and weight of root increased, but in Onobrychis radiata the increase of these parameters were much higher than those of O. viciifolia. The biochemical surveys showed that carotens content and chlorophylls content decreased under the stress conditions in both species, but the xanthophyll content increases and the ratio of carotenoids to chlorophylls increased, with O. radiata being higher in this respect. Because the xanthophyll cycle is one of the strong mechanisms of anti - oxidation in plants, and prohibits of demolition of membranes and supports chlorophyll against photo – oxidation, the increase of xanthophyll results in the increase of plant’s resistance – threshold against oxidation stress arising to water deficit.

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APA: Copy

RAMAK, P., KHAVARINEZHAD, RAMEZAN ALI, HEYDARI SHARIFABAD, H., RAFIEI, MASOUD, & KHADEMI, K.. (2006). THE EFFECT OF WATER STRESS ON DRY WEIGHT AND PHOTOSYNTHETIC PIGMENTS IN TWO SAINFOIN SPECIES. IRANIAN JOURNAL OF RANGELANDS AND FORESTS PLANT BREEDING AND GENETIC RESEARCH, 14(2 (24)), 80-91. SID. https://sid.ir/paper/104312/en

Vancouver: Copy

RAMAK P., KHAVARINEZHAD RAMEZAN ALI, HEYDARI SHARIFABAD H., RAFIEI MASOUD, KHADEMI K.. THE EFFECT OF WATER STRESS ON DRY WEIGHT AND PHOTOSYNTHETIC PIGMENTS IN TWO SAINFOIN SPECIES. IRANIAN JOURNAL OF RANGELANDS AND FORESTS PLANT BREEDING AND GENETIC RESEARCH[Internet]. 2006;14(2 (24)):80-91. Available from: https://sid.ir/paper/104312/en

IEEE: Copy

P. RAMAK, RAMEZAN ALI KHAVARINEZHAD, H. HEYDARI SHARIFABAD, MASOUD RAFIEI, and K. KHADEMI, “THE EFFECT OF WATER STRESS ON DRY WEIGHT AND PHOTOSYNTHETIC PIGMENTS IN TWO SAINFOIN SPECIES,” IRANIAN JOURNAL OF RANGELANDS AND FORESTS PLANT BREEDING AND GENETIC RESEARCH, vol. 14, no. 2 (24), pp. 80–91, 2006, [Online]. Available: https://sid.ir/paper/104312/en

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