QTL controlling grain filling under terminal drought stress in a set of wild barley introgression lines

Drought stress is a prominent and persisting constraint for sustaining global rice (Oryza sativa L.) production. Priming with mild drought can be effective in reducing the impact of severe terminal drought stress affecting seed set and grain filling in rice. The cultivars N22 (drought tolerant), NSIC Rc222 and IR64 (high yielding, drought sensitive) were tested for short-term mild drought priming before flowering and subsequently exposed to severe drought stress either at the highly sensitive flowering or at the early grain filling stage under greenhouse conditions. Drought stress increased oxidative damage and reduced photosynthesis and sink enzymatic activity, ultimately reducing seed set (20–46%) and grain yield (22–68%) across cultivars. However, priming with mild drought significantly reduced oxidative damage, and increased photosynthesis, stomatal conductance and enzymatic activity, contributing to improved sink strength, thereby significantly reducing seed set (7–18%) and grain yield (12–59%) losses. The higher activity of key enzymes associated with sink strength such as cell wall invertase and sucrose synthase in primed plants probably reduced drought-induced losses at the grain filling stage. The findings support mild drought priming before flowering as a promising strategy for reducing yield penalty by providing partial protection against subsequent severe terminal drought stress. However, application of mild drought priming at the field level would need further investigation.

Download Full-text

Comparison of some metabolites alteration in two wheat cultivars subjected to terminal drought stress during grain filling

African Journal of Agricultural Research ◽

10.5897/ajar12.891 ◽

2013 ◽

Vol 8 (16) ◽

pp. 1472-1476

Author(s):

Saeedipour Saeed

Keyword(s):

Drought Stress ◽

Grain Filling ◽

Wheat Cultivars ◽

Terminal Drought ◽

Terminal Drought Stress

Download Full-text

Pod-wall proteomics provide novel insights into soybean seed-filling process under chemical-induced terminal drought stress

Journal of the Science of Food and Agriculture ◽

10.1002/jsfa.9457 ◽

2018 ◽

Vol 99 (5) ◽

pp. 2481-2493 ◽

Cited By ~ 2

Author(s):

Debashree Sengupta ◽

Divya Kariyat ◽

Sureshbabu Marriboina ◽

Attipalli R Reddy

Keyword(s):

Drought Stress ◽

Soybean Seed ◽

Filling Process ◽

Seed Filling ◽

Terminal Drought ◽

Pod Wall ◽

Terminal Drought Stress

Download Full-text

Effects of Enzymatic Biofertiliser on Growth and Yield of Lentil Genotypes under Deficit Irrigation/ Enzimatisko Biomçslojumu Ietekme Uz Daþâdu Lçcu Genotipu Augðanu Un Raþu Irigâcijas Trûkuma Apstâkïos

Proceedings of the Latvian Academy of Sciences Section B Natural Exact and Applied Sciences ◽

10.2478/prolas-2014-0020 ◽

2014 ◽

Vol 68 (3-4) ◽

pp. 174-179

Author(s):

Mohsen Janmohammadi ◽

Hamid Mostafavi ◽

Naser Sabaghnia

Keyword(s):

Drought Stress ◽

Grain Yield ◽

Deficit Irrigation ◽

Morphological Traits ◽

Foliar Application ◽

Growth And Yield ◽

Sowing Time ◽

Ecological Zones ◽

Terminal Drought ◽

Terminal Drought Stress

Abstract Lentil (Lens culinaris Medic.) is one of the important pulse crops in semiarid agro-ecological zones with a Mediterranean-type climate. Terminal drought stress and poor plant nutrition are important factors limiting crop under these regions. The effects of enzymatic biofertiliser (MOG) application at sowing time or during reproductive stage on some morphological traits and yield components of eight lentil lines were evaluated under deficit-irrigation conditions at Maragheh (37°23' N; 46°16' E) in northwestern Iran. Results revealed that application of biofertiliser did not significantly affect most of the morphological traits. However, foliar application of MOG during early flowering stage somewhat increased 100-grain weight and grain yield and decreased the number of empty pod per plant. Moreover, the results indicated that there was significant diversity between lentil lines for the investigated traits. The best performance for grain yield was recorded for FLIP 86-35L. The overall lack of considerable response of lentil to the MOG treatments may suggest that the optimal efficiency of biofertiliser cannot be achieved under water scarcity conditions. Improvement in the adaptation of enzymatic fertilisers to semi arid regions with terminal drought stress requires to be increased.

Download Full-text

Boron-induced improvement in physiological, biochemical and growth attributes in sunflower (Helianthus annuus L.) exposed to terminal drought stress

Journal of Plant Nutrition ◽

10.1080/01904167.2018.1431663 ◽

2018 ◽

Vol 41 (8) ◽

pp. 943-955 ◽

Cited By ~ 2

Author(s):

Muhammad Asif Shehzad ◽

Muhammad Maqsood ◽

Fahim Nawaz ◽

Tasawer Abbas ◽

Sanaullah Yasin

Keyword(s):

Drought Stress ◽

Helianthus Annuus ◽

Helianthus Annuus L ◽

Terminal Drought ◽

Growth Attributes ◽

Terminal Drought Stress

Download Full-text

Groundnut mutants with end-of-season drought tolerance for the marginal dry lands of North Kordofan State, Sudan.

10.1079/9781789249095.0025 ◽

2021 ◽

pp. 243-257

Author(s):

Elgailani Abdalla ◽

Tarig Ahmed ◽

Omar Bakhit ◽

Yasir Gamar ◽

Salih Elshaikh ◽

...

Keyword(s):

Drought Stress ◽

Drought Tolerance ◽

Small Scale ◽

Mutation Induction ◽

Total Production ◽

Drought Period ◽

Dry Lands ◽

Terminal Drought ◽

Drought Tolerant ◽

Terminal Drought Stress

Abstract Groundnut (Arachis hypogaea L.), produced in the traditional small-scale rainfed sector of Western Sudan, accounts for 80% of the total annual groundnut acreage, producing 70% of the total production. Low productivity of groundnut is a characteristic feature in North Kordofan State, which is characterized as the most vulnerable state to the impact of climate change. Terminal drought stress resulting from reduction in rainfall amount and distribution at the end of the season is the most deleterious drought period, as it coincides with groundnut pod filling and maturation periods. High and stable yields under subsistence farming conditions in North Kordofan State could be realized only by using adapted high-yielding, drought-tolerant genotypes. Mutation induction by gamma-rays of 200 and 300 Gy was utilized to irradiate 500 dry seeds of the Spanish-type groundnut genotypes, Barberton, Sodari, ICGV 89104, ICGV 86743, ICGV 86744 and ICG 221, aiming at increasing the chances of obtaining genotypes with the desired drought-tolerant traits. Mutants were selected from the M3 plants using visual morphological traits. Groundnut mutants at the M4 and M5 generations, advanced by single seed descent, were evaluated for end-of-season drought tolerance. A terminal drought period of 25 days was imposed after 60 days from planting, using a rainout shelter. Mutants that survived 25 days of terminal drought stress were further evaluated for agronomic performance under rainfed field conditions. The groundnut mutant, Barberton-b-30-3-B, produced 1024 kg/ha, a significantly higher mean pod yield over 12 seasons compared with 926 kg/ha for 'Gubeish', the widely grown released check cultivar, showing overall yield advantage of 11%. Under 5 years of participatory research, Barberton-b-30-3-B was ranked the best with yield increment of 21% over 'Gubeish' under the mother trials. The GGE biplot analysis for 12 and five seasons, respectively, showed that Barberton-b-30-3-B was stable and produced a good yield in both high and low rainfall situations. Hence, Barberton-b-30-3-B was found to be a suitable mutant for sustainable profitable yields in the marginal dry lands of North Kordofan State and was officially released as 'Tafra-1' by the National Variety Release Committee during its second meeting of April 2018.

Download Full-text

Evidence for genotypic differences among elite lines of common bean in the ability to remobilize photosynthate to increase yield under drought

The Journal of Agricultural Science ◽

10.1017/s0021859616000915 ◽

2016 ◽

Vol 155 (6) ◽

pp. 857-875 ◽

Cited By ~ 21

Author(s):

I. M. RAO ◽

S. E. BEEBE ◽

J. POLANIA ◽

M. GRAJALES ◽

C. CAJIAO ◽

...

Keyword(s):

Drought Stress ◽

Grain Yield ◽

Common Bean ◽

Harvest Index ◽

Genotypic Differences ◽

Area Index ◽

Wild Bean ◽

Terminal Drought ◽

Terminal Drought Stress ◽

Pod Harvest Index

SUMMARYCommon bean (Phaseolus vulgaris L.) is the most important food legume for human consumption. Drought stress is the major abiotic stress limitation of bean yields in smallholder farming systems worldwide. The current work aimed to determine the role of enhanced photosynthate mobilization to improve adaptation to intermittent and terminal drought stress and to identify a few key adaptive traits that can be used for developing drought-resistant genotypes. Field studies were conducted over three seasons at Centro Internacional de Agricultura Tropical, Palmira, Colombia to determine genotypic differences in adaptation to intermittent (two seasons) and terminal (one season) drought stress compared with irrigated conditions. A set of 36 genotypes, including 33 common bean, two wild bean and one cowpea were evaluated using a 6 × 6 lattice design under irrigated and rainfed field conditions. Three common bean elite lines (NCB 226, SEN 56, SER 125) were identified with superior levels of adaptation to both intermittent and terminal drought stress conditions. The greater performance of these lines under drought stress was associated with their ability to remobilize photosynthate to increase grain yield based on higher values of harvest index, pod harvest index, leaf area index and canopy biomass. Two wild bean germplasm accessions (G 19902, G 24390) showed very poor adaptation to both types of drought stress. One small-seeded black line (NCB 226) was superior in combining greater values of canopy biomass with greater ability to mobilize photosynthates to grain under both types of drought stress. Two small-seeded red lines (SER 78, SER 125) seem to combine the desirable traits of enhanced mobilization of photosynthates to seed with effective use of water through canopy cooling under terminal drought stress. Pod harvest index showed significant positive association with grain yield under both types of drought stress and this trait can be used by breeders as an additional selection method to grain yield in evaluation of breeding populations for both types of drought stress.

Download Full-text