Title
Growth and nutritional responses of wild and domesticated cacao genotypes to soil Cd stress
Date Issued
01 April 2021
Access level
open access
Resource Type
journal article
Publisher(s)
Elsevier B.V.
Abstract
Cadmium (Cd), a toxic non-essential metal, is easily accumulated in cacao tissues. This represents a risk for cacao exportation, and consequently it affects the economic well-being of the resource-poor-small-producers in Latin America. A greenhouse experiment was conducted with 53 wild and domesticated cacao genotypes to determine their response to Cd in terms of growth and Cd and essential nutrients accumulation. Cacao seedlings were grown for 6 months in an acidic soil with or without added Cd. The total concentration of macro (Ca, K, Mg, N and P) and micronutrients (B, Cu, Fe, Mn and Zn) as well as Cd were measured in shoots along with growth (biometric) parameters after harvest. The results revealed that even if there was a wide range of Cd concentrations among genotypes, there was a reduction in the concentration of essential nutrients in genotypes grown in Cd spiked soils, however these concentrations were not significantly different from the control. In the case of growth parameters, the effects of Cd were diverse across all genotypes some of them being more tolerant to Cd stress than others. Thus, different growth responses to Cd stress are related to a genotype effect. Based on their lower Cd concentration, a total of 11 cacao genotypes (AYP-22, PAS-105, UGU-126, ICT-1026, ICT-1087, ICT-1189, ICT-1292, PH-17, CCN-51, ICS-39 and TSH-565) are proposed here as low Cd-accumulating genotypes. Therefore, these genotypes are potentially useful as rootstock to reduce uptake and transport of Cd, especially in economically important cacao cultivars.
Volume
763
Language
English
OCDE Knowledge area
Genética, Herencia
Nutrición, Dietética
Subjects
Scopus EID
2-s2.0-85098110363
PubMed ID
Source
Science of the Total Environment
ISSN of the container
00489697
Sponsor(s)
Funding text
The project NACA 58-8042-7-033F of USDA-ARS-ICT partially supported the lab and greenhouse activities. We are grateful to “Programa Nacional de Innovación para la Competitividad y Productividad ( Innóvate Perú )”, for financial support, Contract No 167-FINCyT-IB-2013 . Special deference to Velia Maruxie Yufra Picardo and Carmen Rosa Maza Córdova for opportune advise in developing this work.
Sources of information:
Directorio de Producción Científica
Scopus