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Safflower (Carthamus tinctorius L.) crop adaptation to residual moisture stress: conserved water use and canopy temperature modulation are better adaptive mechanisms.

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Title Safflower (Carthamus tinctorius L.) crop adaptation to residual moisture stress: conserved water use and canopy temperature modulation are better adaptive mechanisms.
Not Available
 
Creator Manikanta ChLN,
Ratnakumar P
Kaliamoorthy S,
Basavaraj PS,
Pandey BB,
Vadlamudi DR,
Nidamarty M,
Guhey A,
Kadirvel P.
 
Subject Safflower
residual soil miosture
Transpiration efficiency, seed yield
 
Description Not Available
Oilseeds with high productivity and tolerance to various environmental stresses are
in high demand in the food and industrial sectors. Safflower, grown under residual
moisture in the semi-arid tropics, is adapted to moisture stress at certain levels.
However, a substantial reduction in soil moisture has a significant impact on its
productivity. Therefore, assessing genetic variation for water use efficiency traits like
transpiration efficiency (TE), water uptake, and canopy temperature depression
(CTD) is essential for enhancing crop adaptation to drought. The response of
safflower genotypes (n = 12) to progressive soil moisture depletion was studied in
terms of water uptake, TE, and CTD under a series of pot and field experiments.
The normalised transpiration rate (NTR) in relation to the fraction of transpirable
soil water (FTSW) varied significantly among genotypes. The genotypes A-1, Bhima,
GMU-2347, and CO-1 had higher NTR-FTSW threshold values of 0.79 (R2 = 0.92),
0.74 (R2 = 0.96), 0.71 (R2 = 0.96), and 0.71 (R2 = 0.91), respectively, whereas GMU-
2644 had the lowest 0.38 (R2 = 0.93). TE was high in genotype GMU-2347, indicating
that it could produce maximum biomass per unit of water transpired. At both the
vegetative and reproductive stages, significant positive relationships between TE,
SPAD chlorophyll metre reading (SCMR) (p < 0.01) and CTD (p < 0.01) were
observed under field conditions by linear regression. The genotypes with high
FTSW-NTR thresholds, high SCMR, and low CTD may be useful clues in identifying
a genotype’s ability to adapt to moisture stress. The findings showed that the
safflower genotypes A-1, Bhima, GMU-2347, and CO-1 exhibited an early decline
and regulated water uptake by conserving it for later growth stages under progressive
soil water depletion.
Not Available
 
Date 2024-01-10T17:31:31Z
2024-01-10T17:31:31Z
2023-08-31
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/81238
 
Language English
 
Relation Not Available;
 
Publisher Not Available