Low Water Potential Disrupts Carbohydrate Metabolism in Maize (Zea mays L.) Ovaries

Zinselmeier, Chris; Westgate, Mark E.; Schussler, Jeffrey R.; Jones, Robert J.

doi:10.1104/pp.107.2.385

Cited by 165 publications

(159 citation statements)

References 24 publications

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“…In general, Suc levels of stressed ovaries are higher or at least similar to those of non-stressed ovaries (Schussler and Westgate, 1991;Schussler and Westgate, 1995;Zinselmeier et al, 1995), indicating that the capacity to use Suc may be impaired by drought. A central role has also been implicated for hexose to Suc balance in regulating key aspects of ovary and seed development (Weber et al, 1996(Weber et al, , 1998Wobus and Weber, 1999;Weschke et al, 2000).…”

mentioning

confidence: 94%

“…Sturm and Tang, 1999). In maize, activity of vacuolar and cell wall-bound acid invertases predominate during ovary and early kernel development, whereas Suc synthase also becomes important during the storage phase of grain-fill (Zinselmeier et al, 1995;Weschke et al, 2000). Drought stress decreases activities of both vacuolar and cell wall-bound acid invertase during kernel development (Zinselmeier et al, 1995), with parallel reductions in ovary growth and concentration of hexoses.…”

mentioning

confidence: 99%

“…Edmeades et al, 1999). Reproductive development at the time of flowering is apparently especially sensitive to drought stress (Zinselmeier et al, 1995(Zinselmeier et al, , 1999, and therefore an understanding of how the involved processes are affected is of particular interest for improving drought tolerance (Boyer, 1996). Drought stress immediately before or after anthesis can affect gynoecium development in several ways.…”

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Soluble Invertase Expression Is an Early Target of Drought Stress during the Critical, Abortion-Sensitive Phase of Young Ovary Development in Maize

et al. 2002

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To distinguish their roles in early kernel development and stress, expression of soluble (Ivr2) and insoluble (Incw2) acid invertases was analyzed in young ovaries of maize (Zea mays) from 6 d before (Ϫ6 d) to 7 d after pollination (ϩ7 d) and in response to perturbation by drought stress treatments. The Ivr2 soluble invertase mRNA was more abundant than the Incw2 mRNA throughout pre-and early post-pollination development (peaking at ϩ3 d). In contrast, Incw2 mRNAs increased only after pollination. Drought repression of the Ivr2 soluble invertase also preceded changes in Incw2, with soluble activity responding before pollination (Ϫ4 d). Distinct profiles of Ivr2 and Incw2 mRNAs correlated with respective enzyme activities and indicated separate roles for these invertases during ovary development and stress. In addition, the drought-induced decrease and developmental changes of ovary hexose to sucrose ratio correlated with activity of soluble but not insoluble invertase. Ovary abscisic acid levels were increased by severe drought only at Ϫ6 d and did not appear to directly affect Ivr2 expression. In situ analysis showed localized activity and Ivr2 mRNA for soluble invertase at sites of phloem-unloading and expanding maternal tissues (greatest in terminal vascular zones and nearby cells of pericarp, pedicel, and basal nucellus). This early pattern of maternal invertase localization is clearly distinct from the well-characterized association of insoluble invertase with the basal endosperm later in development. This localization, the shifts in endogenous hexose to sucrose environment, and the distinct timing of soluble and insoluble invertase expression during development and stress collectively indicate a key role and critical sensitivity of the Ivr2 soluble invertase gene during the early, abortion-susceptible phase of development.

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Soluble Invertase Expression Is an Early Target of Drought Stress during the Critical, Abortion-Sensitive Phase of Young Ovary Development in Maize

et al. 2002

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“…Gyenesné et al (2002) recorded a close positive correlation between ear yield and the rainfall quantity in July (Hegyi et al, 2005). Long-term water deficiency during flowering increased the frequency of aborted kernels in the ears (Zinselmeier et al, 1995). Quaranta et al (2001) reported that water stress affected flowering, yield quantity and grain quality parameters.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the grain yield and quality potential of maize hybrids in different FAO maturity groups

Hegyi

Pók

Berzy

et al. 2008

Acta Agronomica Hungarica

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A total of 96 hybrids from four maturity groups (FAO 200, 300, 400, 500) were tested in two years (2006, 2007) at two locations in Hungary (Martonvásár, Szarvas). Considerable differences were found between the years for the grain yield per hectare and for the grain quality parameters. In 2006 record yields were achieved at both locations, averaging 11.61 t/ha in Martonvásár and 12.20 t/ha in Szarvas, due primarily to well-timed irrigation in Martonvásár and to good rainfall supplies in Szarvas. In 2007 both locations suffered from drought, with less rainfall than average during the critical months of the vegetation period, which was partially compensated for by irrigation in Martonvásár, giving a yield average of 5.96 t/ha, while the hybrids grown in Szarvas had a yield average of 5.06 t/ha. The grain quality parameters exhibited a close correlation with the grain yield in the individual FAO maturity groups. Hybrids of the flint type, which have a short vegetation period, had high protein and oil contents, but the yield averages were low due to the slower rate of starch incorporation. Hybrids of the dent type have a longer vegetation period and more intense carbohydrate accumulation, but low protein and oil contents. In wet years and locations there was a higher rate of starch accumulation, while dry years are favourable for protein and oil accumulation. The Bravais correlation coefficient was calculated between the yield and the grain quality parameters (averaged over years, locations and varieties). A positive, moderately strong correlation (0.68) was found between the yield and the starch content, a negative, moderately strong correlation (-0.52) between the yield and the protein content, and a loose negative correlation (-0.19) between the yield and the oil content.

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“…Previously, Zinselmeier et al (1995) reported that grain weight was most sensitive to abiotic stress during grain formation which limiting assimilates flow toward developing grain (Lee and Tollenarar, 2007). However, potassium application improved grain weight in this experiment through mitigating adverse effect of high temperature on cell number and size in young ovules and was marked by rapid grain expansion and might be related to the low levels of metabolic activities within developing grain.…”

Section: Economic Analysismentioning

confidence: 99%

Agro-economic evaluation of potassium application in spring maize under early and late sown conditions

Ahmad¹,

Akram

2017

Bangladesh J. Sci. Ind. Res.

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Although the yield potential of spring maize is much higher than autumn maize but high temperature at anthesis stage is one of the main problems in spring maize especially in late sown conditions which caused a synchronous pollination, fertilization and grain formation. Early sowing of the crop seems an ideal solution to escape the heat period but low temperature causes poor seedling establishment. Both temperature extremes osmotic and oxidative stresses are major reasons of economical crop damage. Potassium application may lessen these oxidative damages and crop stand establishment of maize under semi arid conditions of Faisalabad. Observations on number of plants per unit area, cobs per plant, grains per cob, 100-grain weight, grain yield, grain protein and oil contents were recorded by using standard procedures. The net income and benefit cost ratio were calculated to evaluate the most economical and profitable potassium level. Sowing dates affected significantly number of plants, cobs per plant, grains and 100-weight, grain yield, grain protein and oil contents while potassium application considerably improved grain yield through increasing crop stand under both early and late sown conditions by ameliorating stresses. It is concluded that the benefit cost ratio of 100 kg ha -1 potassium application is only beneficial under early planting on 1st February.

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Low Water Potential Disrupts Carbohydrate Metabolism in Maize (Zea mays L.) Ovaries

Cited by 165 publications

References 24 publications

Soluble Invertase Expression Is an Early Target of Drought Stress during the Critical, Abortion-Sensitive Phase of Young Ovary Development in Maize

Soluble Invertase Expression Is an Early Target of Drought Stress during the Critical, Abortion-Sensitive Phase of Young Ovary Development in Maize

Comparison of the grain yield and quality potential of maize hybrids in different FAO maturity groups

Agro-economic evaluation of potassium application in spring maize under early and late sown conditions

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