Soil Phosphorus Availability and Pearl Millet Water‐Use Efficiency

Payne, William A.; Drew, M. C.; Hossner, L. R.; Lascano, Robert J.; Onken, A. B.; Wendt, C. W.

doi:10.2135/cropsci1992.0011183x003200040035x

Cited by 59 publications

(49 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To survive under drought condition, the nutrient status of plants plays a significant role in increasing plant tolerance to drought stress (Table 1) (Payne et al, 1992;Marschner, 1995;Rizhsky et al, 2004;Samarah et al, 2004;Yasar et al, 2006;Rotaru and Sinclair, 2009;Rotaru, 2011;Waraich et al, 2011). A study showed that sunflower develops drought resistance with the help of application of micronutrients (Rahimizadeh et al, 2007).…”

Section: Iron and Drought Stressmentioning

confidence: 99%

Acquisition and Homeostasis of Iron in Higher Plants and Their Probable Role in Abiotic Stress Tolerance

Tripathi

Singh

Gaur

et al. 2018

Front. Environ. Sci.

146

View full text Add to dashboard Cite

Iron (Fe) is a micronutrient that plays an important role in agriculture worldwide because plants require a small amount of iron for its growth and development. All major functions in a plant's life from chlorophyll biosynthesis to energy transfer are performed by Fe (Brumbarova et al., 2008;Gill and Tuteja, 2011). Iron also acts as a major constituent of many plant proteins and enzymes. The acquisition of Fe in plants occurs through two strategies, i.e., strategy I and strategy II (Marschner and Römheld, 1994). Under various stress conditions, Nramp and the YSL gene families help in translocation of Fe, which further acts as a mineral regulatory element and defends plants against stresses. Iron plays an irreplaceable role in alleviating stress imposed by salinity, drought, and heavy metal stress. This is because it activates plant enzymatic antioxidants like catalase (CAT), peroxidase, and an isoform of superoxide dismutase (SOD) that act as a scavenger of reactive oxygen species (ROS) (Hellin et al., 1995). In addition to this, their deficiency as well as their excess amount can disturb the homeostasis of a plant's cell and result in declining of photosynthetic rate, respiration, and increased accumulation of Na + and Ca − ions which culminate in an excessive formation of ROS. The short-range order hydrated Fe oxides and organic functional groups show affinities for metal ions. Iron plaque biofilm matrices could sequester a large amount of metals at the soil-root interface. Hence, it has attracted the attention of plant physiologists and agricultural scientists who are discovering more exciting and hidden applications of Fe and its potential in the development of bio-factories. This review looks into the recent progress made in putting forward the role of Fe in plant growth, development, and acclimation under major abiotic stresses, i.e., salinity, drought, and heavy metals.

show abstract

Section: Iron and Drought Stressmentioning

confidence: 99%

Acquisition and Homeostasis of Iron in Higher Plants and Their Probable Role in Abiotic Stress Tolerance

Tripathi

Singh

Gaur

et al. 2018

Front. Environ. Sci.

146

View full text Add to dashboard Cite

show abstract

“…Unfortunately, it is difficult to measure water extraction precisely in the field, especially the small but key amounts that may be extracted during the grain filling period; however, a lysimetric method now exists in which a precise water extraction measurement is possible at all crop stages (e.g. Payne et al 1992;Vadez et al 2008). This method indeed confirms that the extraction of small amounts of water at key stages is critical and likely more informative than measuring total water extraction (Ratnakumar et al 2009;Zaman-Allah et al 2011a;Vadez et al 2013b).…”

Section: The Need For Dynamic Measurements Of Water Extraction At Keymentioning

confidence: 99%

Water: the most important ‘molecular’ component of water stress tolerance research

Vadez

Kholová

Zaman-Allah

et al. 2013

Functional Plant Biol.

View full text Add to dashboard Cite

Abstract. Water deficit is the main yield-limiting factor across the Asian and African semiarid tropics and a basic consideration when developing crop cultivars for water-limited conditions is to ensure that crop water demand matches season water supply. Conventional breeding has contributed to the development of varieties that are better adapted to water stress, such as early maturing cultivars that match water supply and demand and then escape terminal water stress. However, an optimisation of this match is possible. Also, further progress in breeding varieties that cope with water stress is hampered by the typically large genotype Â environment interactions in most field studies. Therefore, a more comprehensive approach is required to revitalise the development of materials that are adapted to water stress. In the past two decades, transgenic and candidate gene approaches have been proposed for improving crop productivity under water stress, but have had limited real success. The major drawback of these approaches has been their failure to consider realistic water limitations and their link to yield when designing biotechnological experiments. Although the genes are many, the plant traits contributing to crop adaptation to water limitation are few and revolve around the critical need to match water supply and demand. We focus here on the genetic aspects of this, although we acknowledge that crop management options also have a role to play. These traits are related in part to increased, better or more conservative uses of soil water. However, the traits themselves are highly dynamic during crop development: they interact with each other and with the environment. Hence, success in breeding cultivars that are more resilient under water stress requires an understanding of plant traits affecting yield under water deficit as well as an understanding of their mutual and environmental interactions. Given that the phenotypic evaluation of germplasm/breeding material is limited by the number of locations and years of testing, crop simulation modelling then becomes a powerful tool for navigating the complexity of biological systems, for predicting the effects on yield and for determining the probability of success of specific traits or trait combinations across water stress scenarios.

show abstract

“…Despite numerous reports about the effects of P deficiency and water stress on millet growth (Manu et al 1991;Buerkert 1995;Bagayoko et al 2000;Brück et al 2003;Valluru et al 2009;Vadez et al 2013), to our knowledge studies investigating the combination of both major stress factors on plant development are lacking, except few (Payne et al 1990(Payne et al , 1992. The novelty of the present study is then in addressing this knowledge gap by using a lysimeter system consisting of large PVC tubes in which plants can be grown in a soil volume allowing soil exploration by the plant similar to field conditions, and where the effects of a factorial of P and water treatments can be investigated.…”

Section: Introductionmentioning

confidence: 99%

Tolerant pearl millet (Pennisetum glaucum (L.) R. Br.) varieties to low soil P have higher transpiration efficiency and lower flowering delay than sensitive ones

et al. 2014

View full text Add to dashboard Cite

Tolerant pearl millet (Pennisetum glaucum (L.) R. Br.) varieties to low soil P have higher transpiration efficiency and lower flowering delay than sensitive ones AbstractBackground and aim In the West African Sahel low soil phosphorus (P) and unpredictable rainfall are major interacting constraints to growth and grain yield of pearl millet. Investigating the relationship between transpiration and final yield under the combined effect of water and P stress is fundamental to understand the underlying mechanisms of tolerance and improve breeding programs. Methods We conducted two lysimeter trials using 1 m long PVC tubes (35 cm diameter) filled with a P poor Sahelian soil mimicking soil profiles to assess grain and stover yield, and water use of 15 pearl millet genotypes grown under different P (no P supply or addition of 1.5 g P tube) and water (well watered or terminal water stress) regimes. In experiment 2 transpiration was measured twice a week from tube weight differences, and transpiration efficiency (TE) was calculated as dry matter (DM) produced per kg of water transpired. Results Low soil P delayed flowering, and more so in sensitive genotypes. Later flowering of genotypes sensitive to low P made them more sensitive to terminal water stress. Under P limiting soil, genotypes tolerant and sensitive to low P used similar amounts of water (19.8 and 21.7 kg water plant −1 , respectively). However, tolerant lines transpired less water prior to anthesis (8.8 kg water plant −1 ) leaving more water available for grain filling (11 kg water plant −1 ) while sensitive lines used 14.4 kg water plant −1 pre-anthesis, leaving only 7.2 kg water plant −1 for grain filling. Low soil P decreased grain yield by affecting seed size at harvest and its damage during seed filling overrode the effect of seed size at sowing. Grain yield was positively correlated with water extracted after anthesis. TE was enhanced by P supply, especially in sensitive lines, and TE was higher in tolerant than in sensitive genotypes under low soil P. Conclusions Pearl millet plants tolerant to low P were more resistant to the delay of flowering caused by low P soil and they presented higher transpiration efficiency. The pattern of transpiration was important to cope with terminal water stress under different levels of P availability. Higher transpiration after anthesis, resulting from conservative water mechanism pre-anthesis (higher TE) and possibly by a shorter delay in flowering under low soil P, enhanced grain yield.

show abstract

Soil Phosphorus Availability and Pearl Millet Water‐Use Efficiency

Cited by 59 publications

References 0 publications

Acquisition and Homeostasis of Iron in Higher Plants and Their Probable Role in Abiotic Stress Tolerance

Acquisition and Homeostasis of Iron in Higher Plants and Their Probable Role in Abiotic Stress Tolerance

Water: the most important ‘molecular’ component of water stress tolerance research

Tolerant pearl millet (Pennisetum glaucum (L.) R. Br.) varieties to low soil P have higher transpiration efficiency and lower flowering delay than sensitive ones

Contact Info

Product

Resources

About