Drought Stress Effect on Crop Pollination, Seed Set, Yield and Quality

Alqudah, Ahmad M.; Samarah, Nezar H.; Mullen, Russell

doi:10.1007/978-94-007-0186-1_6

Cited by 87 publications

(69 citation statements)

References 98 publications

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“…Inhibition or disturbances in any of these processes will result in at least a delayed germination and a reversible stop of growth or in the worst case, germination and tube growth will abort resulting in an unsuccessful fertilization. For instance, pollen germination and tube growth is inhibited in water-stressed plants (Alqudah et al 2011;Fang et al 2010) resulting in a dramatic decrease in seeds and thus, a low crop yield.…”

Section: Introductionmentioning

confidence: 99%

De novo sequencing and analysis of the lily pollen transcriptome: an open access data source for an orphan plant species

2014

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Pollen grains of Lilium longiflorum are a long-established model system for pollen germination and tube tip growth. Due to their size, protein content and almost synchronous germination in synthetic media, they provide a simple system for physiological measurements as well as sufficient material for biochemical studies like protein purifications, enzyme assays, organelle isolation or determination of metabolites during germination and pollen tube elongation. Despite recent progresses in molecular biology techniques, sequence information of expressed proteins or transcripts in lily pollen is still scarce. Using a next generation sequencing strategy (RNAseq), the lily pollen transcriptome was investigated resulting in more than 50 million high quality reads with a length of 90 base pairs. Sequenced transcripts were assembled and annotated, and finally visualized with MAPMAN software tools and compared with other RNAseq or genome data including Arabidopsis pollen, Lilium vegetative tissues and the Amborella trichopoda genome. All lily pollen sequence data are provided as open access files with suitable tools to search sequences of interest.

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Section: Introductionmentioning

confidence: 99%

De novo sequencing and analysis of the lily pollen transcriptome: an open access data source for an orphan plant species

2014

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“…However, its productivity is threatened due to drought stress which may affect the future food security of the globe including South Asia. Drought stress reduces the growth and yield of crops regardless of the stage at which it occurs (Siddique, Hamid, & Islam, ; Atteya, ); nonetheless, it is more devastating at reproductive phases, terminal drought, in wheat (Nawaz, Farooq, Cheema, Yasmeen, & Wahid, ; Farooq, Hussain, & Siddique, ), because it effects pollination and fertilization (Alqudah, Samarah, & Mullen, ), decreases grain filling duration and rate, and causes substantial reduction in grain weight, and final grain yield (Nawaz et al., ). Drought stress also suppresses the endosperm development which drastically reduces the grain size in wheat (Begcy & Walia, ).…”

Section: Introductionmentioning

confidence: 99%

Improving resistance against terminal drought in bread wheat by exogenous application of proline and gamma‐aminobutyric acid

Farooq

Nawaz

Chaudhry

et al. 2017

J Agronomy Crop Science

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Scarcity of water is a severe constraint, which hinders the wheat productivity worldwide. However, foliage application of osmoprotectants may be useful in reducing the drought‐induced yield losses in wheat (Triticum aestivum L.). In this study, potential of foliage applied osmoprotectants (proline, gamma‐aminobutyric acid) in improving the performance of bread wheat against terminal drought was evaluated. Both proline and gamma‐aminobutyric acid (GABA) were foliage applied at 50, 100 and 150 mg/L at anthesis stage (BBCH‐identification code‐ 61), in two bread wheat cultivars viz. Mairaj‐2008 and BARS‐2009. After 1 week of foliage application of these osmoprotectants, drought was imposed by maintaining the pots at 35% water holding capacity. Imposition of drought caused significant reduction in the grain yield of both tested bread wheat cultivars; nonetheless, foliage applied osmoprotectants at either concentration improved the chlorophyll contents, accumulation of proline, glycinebetaine and total soluble phenolics and reduced the malondialdehyde contents, which resulted in better stay green, maintenance of grain weight and grain number under drought stress, thus resulting in better grain yield, water‐use efficiency and transpiration efficiency in both wheat cultivars. However, foliage applied proline at 150 mg/L, and GABA at 100 mg/L was most effective than other concentrations of these osmoprotectants. Performance of cultivar Mairaj‐2008 was quite better than cultivar BARS‐2009. In crux, foliar application of proline and GABA at pre‐optimized rate can be opted as a shotgun approach to improve the performance of wheat under terminal drought.

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“…However, variation in heat tolerance among different wheat cultivars has been reported by several researchers (Zhao, Dai, Jiang, & Cao, ; Nawaz et al, ). Similarly, drought stress is also very detrimental when it occurs at reproductive and grain filling stages because it affects pollination (Alqudah, Samarah, & Mullen, ), decreases grain filling rate and duration and reduces grain weight and eventually the grain yield (Nawaz, Farooq, Cheema, Yasmeen, & Wahid, ). Drought stress also causes the male sterility, which decreases the grain formation in cereals (Jin, Yang, Wei, Ma, & Ge, ).…”

Section: Introductionmentioning

confidence: 99%

Application of natural plant extracts improves the tolerance against combined terminal heat and drought stresses in bread wheat

Farooq

Rizwan

Nawaz

et al. 2017

J Agronomy Crop Science

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Drought and heat are among the main abiotic stresses causing severe damage to the cereal productivity when occur at reproductive stages. In this study, ten wheat cultivars were screened for combined heat and drought tolerance imposed at booting, heading, anthesis and post‐anthesis stages, and role of the foliage applied plant extracts was evaluated in improving the performance of differentially responding wheat cultivars under terminal heat and drought stresses. During both years, wheat crop was raised under ambient temperature and 70% water holding capacity (WHC) till leaf boot stage. The plant extracts (3% each) of sorghum, brassica, sunflower and moringa were foliage applied at booting, anthesis and post‐anthesis stage; and after one week of application of these plant extracts, combined heat and drought was imposed at each respective stage. Heat and drought stresses were imposed at each respective stage by placing pots in glass canopies with temperature of 4 ± 2°C above than the ambient temperature in combination with drought stress (35% WHC) until maturity. Combination of drought and heat stresses significantly reduced the performance of tested wheat cultivars; however, stress at the booting and heading stages was more damaging than the anthesis and post‐anthesis stages. Cultivars Mairaj‐2008 and Chakwal‐50 remained green with extended duration for grain filling, resulting in the maintenance of number of grains per spike and 100‐grain weight under stress conditions and thus had better grain yield and water‐use efficiency. However, in cultivars Fsd‐2008, and Shafaq‐2006, the combined imposition of drought and heat accelerated the grain filling rate with decrease in grain filling duration, grain weight and grain yield. Foliar application of all the plant extracts improved the wheat performance under terminal heat and drought stress; however, brassica extract was the most effective. This improvement in grain yield, water‐use efficiency and transpiration efficiency due to foliage applied plant extracts, under terminal heat and drought stress, was owing to better stay‐green character and accumulation of more soluble phenolics, which imparted stress tolerance as indicated by relatively stable grain weight and grain number. In crux, growing of stay‐green wheat cultivars with better grain filling and foliage application of plant extracts may help improving the performance of bread wheat under combined heat and drought stresses.

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Drought Stress Effect on Crop Pollination, Seed Set, Yield and Quality

Cited by 87 publications

References 98 publications

De novo sequencing and analysis of the lily pollen transcriptome: an open access data source for an orphan plant species

De novo sequencing and analysis of the lily pollen transcriptome: an open access data source for an orphan plant species

Improving resistance against terminal drought in bread wheat by exogenous application of proline and gamma‐aminobutyric acid

Application of natural plant extracts improves the tolerance against combined terminal heat and drought stresses in bread wheat

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