Drought tolerance in potential oilseed plants for biofuel production

Moura, L.M.De.F and Costa, A.C. and Müller, C. and etc, . (2018) Drought tolerance in potential oilseed plants for biofuel production. Australian Journal of Crop Science, 12 (2). pp. 289-298.

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Abstract

Raphanus sativus L. and Crambe abyssinica Hochst. are promising crops for supplying oil to chemical industries. They are not used for human consumption and can be grown off-season due to their short life cycle. However, drought may limit their growth, photosynthesis and productivity. Thus, the aim of this research was to evaluate the morphological and physiological responses of R. sativus and C. abyssinica subjected to water deficit to identify the strategies used by these species to tolerate the effects of water stress. Two independent experiments for R. sativus and C. abyssinica were conducted with different water replacements: 100% (control), 66% and 33% of the field capacity. The characteristics of water relations, gas exchange, chlorophyll fluorescence, chloroplastidic pigments, morphology and root distribution in the soil profile were evaluated separately in both crops. The results indicate the ability of both species to control water loss. In R. sativus and C. abyssinica, the cell turgor and consequently photosynthesis and growth were maintained even under drought conditions. The maintenance of water status was achieved by osmotic adjustment in R. sativus, and also the root distribution and deepening in both species. Such responses allowed R. sativus and C. abyssinica to be classified as tolerant to drought conditions.

Item Type: Article
Uncontrolled Keywords: Abiotic stress; crambe; forage turnip; root system; water deficit
Author Affiliation: Ecophysiology and Plant Productivity Laboratory, Goiano Federal Institute of Science and Technology– Campus Rio Verde, P.O. box 66, 75901-970, Rio Verde, GO, Brazil
Subjects: Plant Production
Divisions: General
Depositing User: Mr T L Gautham
Date Deposited: 03 Aug 2018 05:49
Last Modified: 03 Aug 2018 05:49
URI: http://eprints.icrisat.ac.in/id/eprint/15502

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