RT Journal Article
SR Electronic
T1 The potential of dynamic physiological traits in young tomato plants to predict field-yield performance
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2021.03.18.435447
DO 10.1101/2021.03.18.435447
A1 Sanbon Chaka Gosa
A1 Amit Koch
A1 Itamar Shenhar
A1 Joseph Hirschberg
A1 Dani Zamir
A1 Menachem Moshelion
YR 2021
UL http://biorxiv.org/content/early/2021/11/13/2021.03.18.435447.abstract
AB To address the challenge of predicting tomato yields in the field, we used whole-plant functional phenotyping to evaluate water relations under well-irrigated and drought conditions. The genotypes tested are known to exhibit variability in their yields in wet and dry fields. The examined lines included two lines with recessive mutations that affect carotenoid biosynthesis, zeta z2083 and tangerine t3406, both isogenic to the processing tomato variety M82. The two mutant lines were reciprocally grafted onto M82, and multiple physiological characteristics were measured continuously, before, during and after drought treatment in the greenhouse. A comparative analysis of greenhouse and field yields showed that the whole-canopy stomatal conductance (gsc) in the morning and cumulative transpiration (CT) were strongly correlated with field measurements of total yield (TY: r2 = 0.9 and 0.77, respectively) and plant vegetative weight (PW: r2 = 0.6 and 0.94, respectively). Furthermore, the minimum CT during drought and the rate of recovery when irrigation was resumed were both found to predict resilience.Competing Interest StatementThere are no competing interests