Open AccessPhysiological and ethylene accumulation responses of cassava under drought stress
Author(s) -
P. Ogaddee,
Teerayoot Girdthai
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/346/1/012092
Subject(s) - manihot esculenta , water content , sowing , horticulture , ethylene , greenhouse , water stress , moisture , biology , agronomy , chemistry , biochemistry , geotechnical engineering , organic chemistry , engineering , catalysis
Drought is a major production constraint of cassava worldwide. The objective of this study was to evaluate the chemo-physiological and phytohormone responses of cassava under water stress conditions. Five cassava (Manihot esculenta) varieties were grown in greenhouse conditions under different water regimes (field capacity (FC), 2/3 and 1/3 available water (AW)). The physiological responses to drought were monitored. Plant height, relative water content (RWC) and SPAD Chlorophyll meter reading (SCMR) were recorded at 3, 4 and 5 months after planting. Ethylene accumulate were recorded at 1, 2 and 3 weeks after withholding water at 2 months after planting. The result revealed that plant height and RWC decreased significant difference under water deficit. Plant height and RWC under 1/3 AW had lowest followed by 2/3 AW and FC conditions. Under 1/3 AW, ethylene and SCMR increased significant difference followed by 2/3 AW and FC conditions. Thus, plant height, RWC, SCMR and ethylene accumulation could be used as a criterion in breeding programs to improve drought tolerance in cassava.