Osmotic adjustment, drought tolerance and yield in castor (Ricinus communis L.) hybrids
By M. Babita, M. Maheswari, L. Rao, A. Shanker, D. Rao. Environmental and Experimental Botany, 2010
138 citations recorded by the source corpus.
Abstract A study was conducted to analyse the association of osmotic adjustment (OA) with drought tolerance and yield in castor (Ricinus communis L.). Hybrids (GCH4, DCH32 and DCH177) and their respective parents (VP-1, 48-1, LRES17, DCS5, DPC9 and DCS9) were assessed for their osmotic adjustment, leaf water relations, accumulation of compatible solutes in relation to seed yield in response to moisture stress at primary spike development stage. OA increased with increasing stress period up to 33 days and the increase was more rapid in the high OA (HOA) genotypes. HOA genotypes also had higher leaf RWC and ELWRC and maintained higher leaf water potentials (Ψl) compared to LOA genotypes under water deficit. Genotypes with HOA accumulated greater levels of proline, total soluble sugars (TSS), total free amino acids (FAA) and potassium than those with LOA in response to water deficit. Contribution of TSS was the maximum (61%), compared to FAA (17%), proline (12%) and potassium (2.8%) to the Ψs at 33 days after imposing water deficit indicating that sugars were the major contributors towards OA in castor leaves. A positive relationship existed between OA of expanded leaf 33 days after imposing stress (r = 0.8539) and total seed yield under water-limited conditions in various castor genotypes tested and HOA genotypes had higher total seed yield than genotypes with LOA. Genotype variability exists for OA and it is a heritable trait in castor. Hybrids followed their superior parents in terms of OA. HOA genotypes of castor produced significantly higher seed yield than LOA genotypes. Accumulation of TSS contributed largely to the OA in castor.
Subfields: Plant Science
View Paper: https://www.semanticscholar.org/paper/9a5bae6414bde5d31ef6a71158196389fed28c71
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Citations in the corpus
- Physiological Responses of Selected Vegetable Crop Species to Water Stress (2019, background): “It was found that peas and castor beans exposed to water deficit accumulate a significant amount of soluble sugars and proline [72,73], and the raffinose and sucrose level of leaves are significantly increased by water stress during flowering of snap beans [74].”
- Stoichiometry of potassium is largely determined by water availability and growth in Catalonian forests (2012, background): “…of K in tissues are important in the physiology of plants (Paoli, Curran & Zak 2005), particularly in controlling the foliar content of water (Babita et al. 2010) through its effects on stomatal function (Fernandez, Novillo & Pardos 2006; Khosravifar et al. 2008), the control of osmosis…”
- A Review on the Challenges for Increased Production of Castor (2012, background): “862 Agronomy Journa l • Volume 104, Issue 4 • 2012 with higher osmotic adjustment was 53% greater compared to genotypes with low osmotic adjustment (Babita et al., 2010).”