Environmental explanation of maize specific leaf area under varying water stress regimes

Zhou, Huailin; Zhou, Guangsheng; He, Qijin; Zhou, Li; Ji, Yunpeng; Zhou, Mengzi

doi:10.1016/j.envexpbot.2019.103932

Cited by 65 publications

(39 citation statements)

References 59 publications

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“…The leaf is the main organ which responds to environmental conditions more clearly in respect to other organs, such as the stem and roots [42,43]. Thus, leaf area is a critical trait in plant growth; in general, plants tend to decrease their LA when coping with water stress in order to minimize water losses through transpiration [44]. In castor bean plants of this work, the LA was significantly affected by water scarcity (Figure 3).…”

Section: Resultsmentioning

confidence: 72%

Tolerance to Drought and Water Stress Resistance Mechanism of Castor Bean

et al. 2020

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Castor bean (Ricinus communis L.) is a multipurpose crop; its oil has numerous applications worldwide and the last decade demonstrated a growing international demand. The aim of this work was to investigate the level of castor bean tolerance to drought and its possession of a water stress resistance mechanism by applying three different water regimes in a glasshouse pot experiment conducted for two years. The treatments applied were 70% (T70-control), 55% (T55) and 40% (T40) of the available soil moisture. The results showed that the growth parameters height, trunk diameter, and fresh and dry weights of leaves and stems were not affected by the moderate water scarcity (T55), while they were significantly decreased by T40. Significant decrease in leaf number was observed in both T55 (17%) and T40 (27%) plants, with a delay of 4 weeks in the lower treated plants. Leaf area was decreased by 54% and 20% in T55 and T40 respectively, indicating that its reduction was mainly due to a reduction of leaf size than of leaf number. The leaf water potential was increased negatively with increasing stress, showing a water loss and decrease of turgidity in cells. Stomatal resistance was significantly higher at the higher water scarcity and this response indicates a water stress resistance mechanism. This result was also confirmed by the regression analysis performed between stomatal resistance and leaf water potential. In conclusion, castor bean showed a tolerance ability under water stress conditions and its early physiological reaction allows its acclimatization to drought conditions.

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Section: Resultsmentioning

confidence: 72%

Tolerance to Drought and Water Stress Resistance Mechanism of Castor Bean

et al. 2020

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“…Moreover, GR24 priming treatments did not increase the germination percentage. Specific leaf area (SLA) is the ratio of leaf biomass to leaf area and is a measure of plant strategy in response to environmental changes (Zhou et al, 2020). Our study results showed that SLA increased with GR24 priming and only with GR24 in Sultan-95 and Tosunbey seedlings under drought stress.…”

Section: Total Protein Contentmentioning

confidence: 65%

The Effects of Some Seed Priming Treatments on Germination and Seedling Development in Wheat

2021

JSTR

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“…However, the stimulation of nighttime respiration and carbohydrate depletion could be compensated for by nocturnal warmingled promotion of daytime photosynthesis and carbohydrate assimilation, which resulted in yield improvement [18,26]. Furthermore, plant leaves optimize their carbon assimilation capacity by adjusting the leaf thickness and develop the ability to acquire, transport and utilize resources when their environments change [29,30]. However, we did not find a significant difference in the specific leaf weight of ear leaves in either growing season (Figure 6).…”

Section: Photosynthesis and Respirationmentioning

confidence: 72%

Open Field Simulating Nocturnal Warming on Summer Maize Performance in the North China Plain

et al. 2021

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Climate changes show asymmetrical warming, and warming is typically greater at night than during the day. To understand how nocturnal warming (NW) affects the performance of maize (Zea mays L.), an open-field experiment with a free air temperature increase (FATI) facility was conducted for three seasons during 2014 to 2016 at Luancheng eco-agro-experimental station on the North China Plain (NCP). Three nocturnal warming scenarios were set up: the entire growing period (T1, from V4 to maturity), only the vegetative stages (T2, from V4 to a week presilking) and the reproductive stages (T3, from a week presilking to R6). The treatment without NW was the control. Maize lodged seriously in 2015 due to heavy rainfall combined with strong winds, and the experiment failed. The results from 2014 and 2016 were analyzed in this study. During the experimental duration, the average nocturnal temperature was increased by approximately 3.6 and 3.3 °C at 150 cm height and 2.0 and 1.7 °C at the soil surface during the vegetative stages. The corresponding increases were 2.1 and 2.5 °C and 0.7 and 1.2 °C at the soil surface during the reproductive stages in 2014 and 2016, respectively, as compared with that of the CK treatment. NW during the whole growth period significantly decreased maize yield for the two seasons. Treatment T2 had a smaller impact on maize yield than T1 and T3. The silking stage was delayed by 2 days in 2014 and 2016 under T1. As a result, presilking duration and VT-R1 interval were prolonged by 1–2 days; and the postsilking duration were shortened by 1–3 days under T1. The soil moisture in the warmed plots was slightly lower than that in the control plots in the 2014 and during the stages before the earlier grain-filling stages in 2016, but NW decreased soil water content greatly at the later grain-filling stages in 2016, which caused the fast green leaf senescence and exacerbated the negative effects of NW on maize yield. NW for the whole growth duration (T1) significantly decreased seed weight and harvest index. NW increased leaf nighttime respiration rate in both seasons. No significant effects of NW on ear leaf net photosynthesis, leaf area, and specific leaf weight at early grain-filling stage were observed, irrespective of the warming stage and season. The results suggested that reproductive stages were more sensitive to NW compared to vegetative stages under the growing conditions of NCP. The negative effects of NW were worsened in dry seasons. The reduction in maize yield with nocturnal warming was driven by the reduction in the aboveground carbon allocation from shoot to grain during postanthesis stage.

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Environmental explanation of maize specific leaf area under varying water stress regimes

Cited by 65 publications

References 59 publications

Tolerance to Drought and Water Stress Resistance Mechanism of Castor Bean

Tolerance to Drought and Water Stress Resistance Mechanism of Castor Bean

The Effects of Some Seed Priming Treatments on Germination and Seedling Development in Wheat

Open Field Simulating Nocturnal Warming on Summer Maize Performance in the North China Plain

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