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Changes in root xylem anatomy of peanut genotypes with different drought resistance levels under early‐season drought
Author(s) -
Thangthong Nuengsap,
Jogloy Sanun,
Jongrungklang Nuntawoot,
Kvien Craig K.,
Dodd Ian C.,
Vorasoot Nimitr
Publication year - 2021
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/jac.12492
Subject(s) - xylem , biology , drought tolerance , growing season , agronomy , water content , tifton , drought resistance , horticulture , forage , geotechnical engineering , engineering
During the 2014 and 2015 seasons, peanut root anatomy studies were conducted under well‐watered and under drought conditions using three peanut genotypes which are known to differ in their physiological responses to early‐ and mid‐season drought (ICGV 98,305, ICGV 98,324 and Tifton‐8). Cross sections of the newly formed roots revealed that the average vessel diameter and total vessel area in the first‐order roots were significantly reduced under drought in ICGV 98,305 and ICGV 98,324, yet not in Tifton‐8, which had the smallest vessel diameters and total area in both well‐watered and drought treatments. The xylem vessel structure in newly formed roots of ICGV 98,324 was very responsive to changes in soil moisture content. This adaptive capacity of ICGV 98,324 to change xylem structure as soil moisture conditions change may provide plant breeders an important trait which will lead to better water‐use efficiencies in both moist and drought conditions.