Effect of Drought Stress on Leaf and Whole Canopy Radiation Use Efficiency and Yield of Maize

Earl, Hugh J.; Davis, Richard F.

doi:10.2134/agronj2003.0688

Cited by 173 publications

(160 citation statements)

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“…Chlorophyll fluorescence techniques could be used as a more practical method of indirectly measuring the photosynthetic rates of plant leaves, rather than gas exchange techniques (Earl and Tollenaar, 1999;Adams et al, 2000;Earl and Davis, 2003). In our study (Table 3), Pn and chlorophyll content were significantly (P<0.05) positively correlated with Y(II), ETR and qP, indicating that measurements of chlorophyll fluorescence could serve to differentiate tolerant maize strains from those susceptible to low light intensity.…”

Section: Different Responses To Low Light Intensity In Chlorophyll Flmentioning

confidence: 63%

Comparative studies on the photosynthetic characteristics of two maize (Zea mays L.) near-isogenic lines differing in their susceptibility to low light intensity

Qian

Zhang

Zhong

et al. 2017

Emir. J. Food Agric

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Section: Different Responses To Low Light Intensity In Chlorophyll Flmentioning

confidence: 63%

Comparative studies on the photosynthetic characteristics of two maize (Zea mays L.) near-isogenic lines differing in their susceptibility to low light intensity

Qian

Zhang

Zhong

et al. 2017

Emir. J. Food Agric

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“…Three main mechanisms reduce crop yield by soil water deficit: (i) reduced canopy absorption of photosynthetically active radiation, (ii) decreased radiation-use efficiency and (iii) reduced harvest index (Earl and Davis, 2003). The reproducibility of drought stress treatments is very cumbersome, which significantly impedes research on plant drought tolerance.…”

Section: Introductionmentioning

confidence: 99%

Plant drought stress: effects, mechanisms and management

Farooq

Wahid

Kobayashi

et al. 2009

Agron. Sustain. Dev.

3,048

1,622

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-Scarcity of water is a severe environmental constraint to plant productivity. Drought-induced loss in crop yield probably exceeds losses from all other causes, since both the severity and duration of the stress are critical. Here, we have reviewed the effects of drought stress on the growth, phenology, water and nutrient relations, photosynthesis, assimilate partitioning, and respiration in plants. This article also describes the mechanism of drought resistance in plants on a morphological, physiological and molecular basis. Various management strategies have been proposed to cope with drought stress. Drought stress reduces leaf size, stem extension and root proliferation, disturbs plant water relations and reduces water-use efficiency. Plants display a variety of physiological and biochemical responses at cellular and whole-organism levels towards prevailing drought stress, thus making it a complex phenomenon. CO 2 assimilation by leaves is reduced mainly by stomatal closure, membrane damage and disturbed activity of various enzymes, especially those of CO 2 fixation and adenosine triphosphate synthesis. Enhanced metabolite flux through the photorespiratory pathway increases the oxidative load on the tissues as both processes generate reactive oxygen species. Injury caused by reactive oxygen species to biological macromolecules under drought stress is among the major deterrents to growth. Plants display a range of mechanisms to withstand drought stress. The major mechanisms include curtailed water loss by increased diffusive resistance, enhanced water uptake with prolific and deep root systems and its efficient use, and smaller and succulent leaves to reduce the transpirational loss. Among the nutrients, potassium ions help in osmotic adjustment; silicon increases root endodermal silicification and improves the cell water balance. Low-molecular-weight osmolytes, including glycinebetaine, proline and other amino acids, organic acids, and polyols, are crucial to sustain cellular functions under drought. Plant growth substances such as salicylic acid, auxins, gibberrellins, cytokinin and abscisic acid modulate the plant responses towards drought. Polyamines, citrulline and several enzymes act as antioxidants and reduce the adverse effects of water deficit. At molecular levels several drought-responsive genes and transcription factors have been identified, such as the dehydration-responsive element-binding gene, aquaporin, late embryogenesis abundant proteins and dehydrins. Plant drought tolerance can be managed by adopting strategies such as mass screening and breeding, marker-assisted selection and exogenous application of hormones and osmoprotectants to seed or growing plants, as well as engineering for drought resistance. drought response / stomatal oscillation / osmoprotectants / hormones / stress proteins / drought management / CO 2

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“…Ge et al (2012) reported that maize development and grain yield are affected not only by the severity of drought stress but also by the stage of development at which the plant is exposed to that stress. Mild and severe drought stress treatments reduced final grain yield by 63% and 85%, respectively, and by 13% and 26%, respectively in two years' experiment of Earl and Davis (2003) setting three irrigation treatments (control, mild water stress, severe water stress). Ge et al (2012) studied the effects of drought on summer maize throughout the grow cycle by setting the soil water to 75% field water capacity (FC), 55% FC medium stress, and 35% FC high stress.…”

mentioning

confidence: 99%

Differential responses of maize yield to drought at vegetative and reproductive stages

Mi¹,

Cai²,

Zhang³

et al. 2018

Plant Soil Environ.

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. (2018): Differential responses of maize yield to drought at vegetative and reproductive stages. Plant Soil Environ., 64: 260-267.Determining the effects of progressive drought (PD) on dry matter production, partitioning, and grain yield of maize will help in designing a suitable strategy for water management. Though influences of drought on maize growth and development have been investigated extensively, few of them focused on the effects of different duration and occurrence stage of PD on yield formation of maize. Six variations of PD, in the form of withholding irrigation for varying lengths of time from jointing or tasselling, were tested in the field, using a mobile rain shelter, in terms of their effects on aboveground biomass accumulation, partitioning, and grain yield in 2015-2016. The results showed that grain yield was significantly reduced by PD during either vegetative or reproductive stage, and the reduction in grain yield from reproductive PD (41.6-46.6%) was greater than that from vegetative PD (18.6-26.2%). The decrease in grain yield was largely caused by the decrease in kernels per ear (r 2 = 0.88, P < 0.001). This research implied that guaranteeing water supply for maize during reproductive stage is crucially important to avoid the reduction in kernels per ear and grain yield.

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Effect of Drought Stress on Leaf and Whole Canopy Radiation Use Efficiency and Yield of Maize

Cited by 173 publications

References 0 publications

Comparative studies on the photosynthetic characteristics of two maize (Zea mays L.) near-isogenic lines differing in their susceptibility to low light intensity

Comparative studies on the photosynthetic characteristics of two maize (Zea mays L.) near-isogenic lines differing in their susceptibility to low light intensity

Plant drought stress: effects, mechanisms and management

Differential responses of maize yield to drought at vegetative and reproductive stages

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