High-Temperature and Drought Stress Effects on Growth, Yield and Nutritional Quality with Transpiration Response to Vapor Pressure Deficit in Lentil

Published Date
January 01, 2022
Type
Journal Article
High-Temperature and Drought Stress Effects on Growth, Yield and Nutritional Quality with Transpiration Response to Vapor Pressure Deficit in Lentil
Authors:
Noureddine El Haddad
Hasnae Choukri, Hasnae Choukri, Michel Edmond Ghanem, Abdelaziz Smouni, Rachid Mentag, Karthika Rajendran, Kamal Hejjaoui, Fouad Maalouf, Shiv Kumar Agrawal

High temperature and water deficit are among the major limitations reducing lentil (Lens
culinaris Medik.) yield in many growing regions. In addition, increasing atmospheric vapor pressure
deficit (VPD) due to global warming causes a severe challenge by influencing the water balance of the
plants, thus also affecting growth and yield. In the present study, we evaluated 20 lentil genotypes
under field conditions and controlled environments with the following objectives: (i) to investigate the
impact of temperature stress and combined temperature-drought stress on traits related to phenology,
grain yield, nutritional quality, and canopy temperature under field conditions, and (ii) to examine
the genotypic variability for limited transpiration (TRlim) trait in response to increased VPD under
controlled conditions. The field experiment results revealed that high-temperature stress significantly
affected all parameters compared to normal conditions. The protein content ranged from 23.4 to
31.9%, while the range of grain zinc and iron content varied from 33.1 to 64.4 and 62.3 to 99.3 mg kg−1
,
respectively, under normal conditions. The grain protein content, zinc and iron decreased significantly
by 15, 14 and 15% under high-temperature stress, respectively. However, the impact was more severe
under combined temperature-drought stress with a reduction of 53% in protein content, 18% in zinc
and 20% in iron. Grain yield declined significantly by 43% in temperature stress and by 49% in the
combined temperature-drought stress. The results from the controlled conditions showed a wide
variation in TR among studied lentil genotypes. Nine genotypes displayed TRlim at 2.76 to 3.51 kPa,
with the genotypes ILL 7833 and ILL 7835 exhibiting the lowest breakpoint. Genotypes with low
breakpoints had the ability to conserve water, allowing it to be used at later stages for increased
yield. Our results identified promising genotypes including ILL 7835, ILL 7814 and ILL 4605 (Bakria)
that could be of great interest in breeding for high yields, protein and micronutrient contents under
high-temperature and drought stress. In addition, it was found that the TRlim trait has the potential
to select for increased lentil yields under field water-deficit environments

Citation:
Noureddine El Haddad, Hasnae Choukri, Michel Edmond Ghanem, Abdelaziz Smouni, Rachid Mentag, Karthika Rajendran, Kamal Hejjaoui, Fouad Maalouf, Shiv Kumar Agrawal. (1/1/2022). High-Temperature and Drought Stress Effects on Growth, Yield and Nutritional Quality with Transpiration Response to Vapor Pressure Deficit in Lentil. Plants, 11 (1).
Keywords:
lentil
grain yield
zinc and iron
canopy temperature
temperature stress
vapor pressure deficit
limited transpiration trait
crude protein
drought stress
biofortification