Temporal Dynamics of Cotton Leaves and Canopies

Constable, G. A.; Oosterhuis, Derrick M.

doi:10.1007/978-90-481-3195-2_7

Cited by 8 publications

(6 citation statements)

References 46 publications

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“…The FBL: MSL area ratio for the 1 st FBL was similar to the one reported by Constable and Oosterhuis [8]. However, the area ratios for the second and third position FBL were significantly different from the values reported these authors (Table 2).…”

Section: Assessing Consistency Of Area Ratios Between Fbl and Mslsupporting

confidence: 86%

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Estimating the Leaf Area of Cotton (Gossypium hirsutum L.) Plants by Means of Relationships between Monopodial and Sympodial Leaves

Carvalho

Fernández

Grichar

2016

AJEA

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Section: Assessing Consistency Of Area Ratios Between Fbl and Mslsupporting

confidence: 86%

“…The ratio values between MSL and FBL were calculated by dividing the area of each successive FBL by the area of their corresponding MSL. The 95% confidence interval (95% CI) for the means of these ratios were calculated in order to check the agreement of these values with those reported by Constable and Oosterhuis [8].…”

Section: Methodsmentioning

confidence: 87%

Estimating the Leaf Area of Cotton (Gossypium hirsutum L.) Plants by Means of Relationships between Monopodial and Sympodial Leaves

Carvalho

Fernández

Grichar

2016

AJEA

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“…In addition, an increase in the night temperature from 20 to 28°C for 4 h each night for 4 weeks led to an increased respiration rate, decreased ATP content and severe carbohydrate depletion in the leaves. Research by Pettigrew (2001) indicated that inadequate carbohydrate supply to developing cotton bolls could result in lower fiber quality, since more than 90 % of cotton fiber consists of cellulose (Constable and Oosterhuis 2010). Furthermore, Pettigrew (2008) reported that warmer day and NTs resulted in fewer nodes above the white flower, indicating a slightly advanced crop maturity.…”

Section: Introductionmentioning

confidence: 99%

High Night Temperatures During the Floral Bud Stage Increase the Abscission of Reproductive Structures in Cotton

Echer

Oosterhuis

Loka

et al. 2014

J Agronomy Crop Science

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Cotton‐producing regions throughout the world often experience high night temperatures (HNTs), affecting flowering and yield in cotton (Gossypium hirsutum). The objective of this study was to quantify the effects of high nighttime temperatures on the physiological and biochemical characteristics of cotton during the floral bud and flowering stages. Growth chamber experiments were conducted in 2011–2012 and treatments included a control (day/night temperature of 32/24 °C) and two HNT treatments (32/29 °C from 8:00 pm to 12:00 am) for 3 weeks from the beginning of each phenological stage, i.e., first floral bud (B1) and first flower (F1). The results indicated that increased night temperatures (NTs) during the floral bud and flowering stages increased the rate of flower production per plant. However, no increase was observed in the final number of reproductive structures because the rate of floral abortion also increased for both treatments compared to the control. Additionally, the increase in night temperature during the floral bud stage reduced the sucrose content in the flower, resulting in decreased pollen viability and premature abortion of reproductive structures while the onset of flowering period was also delayed and lower accumulation of reproductive dry matter was observed. HNTs during the flowering stage reduced the number of seeds per locule and the number of seeds per boll. In general, higher than optimum NTs affected sucrose metabolism of the cotton flower and consequently its pollen viability. As a result the flowering period was delayed and a reduction in reproductive dry matter accumulation was observed due to premature abortion of reproductive structures. Finally, cotton is more sensitive to HNT at floral bud stage and this finding may be important to adjust cotton planting date, management and breeding.

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“…Further analysis, however, revealed that the reductions in total reproductive dry weight of ST5288 were associated with decreases in number of reproductive structures per plant, while in VH260, they were due to decreases in the dry weight per reproductive structure. Abscission of reproductive structures, with the exception of white flowers, in cotton, is a naturally occurring procedure, as the plant tries to balance the sink's (reproductive structures) demand for photoassimilates with the source (leaf) availability of photoassimilates [50]. However, abiotic stresses have been shown to exacerbate shedding of reproductive structures, mainly due to reductions in leaf photosynthetic rates that result in perturbations of carbohydrate metabolism and availability of leaves and reproductive structures [51].…”

Section: Discussionmentioning

confidence: 99%

Physiological and Biochemical Responses of Two Cotton (Gossypium hirsutum L.) Cultivars Differing in Thermotolerance to High Night Temperatures during Anthesis

Loka¹,

Oosterhuis

2020

Agriculture

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Heat stress constitutes a major threat to crop production, and according to climatic projections, night temperatures are expected to increase faster and to a greater extent compared to day temperatures. While extensive research has been dedicated to the effects of higher than optimum day temperatures on cotton physiology, metabolism, and yield, and while heat-tolerant cotton cultivars have been introduced, the responses of such heat-tolerant cultivars to high night temperatures have not been evaluated. The objective of this study was to assess the efficiency of heat-tolerant cultivars to high night temperatures stress by monitoring the physiological and biochemical responses of two cotton cultivars, differing in thermotolerance, subjected to higher than optimum night temperatures, during anthesis. To that end, growth chamber experiments were conducted using two cotton cultivars differing in thermotolerance, namely ST5288B2RF (thermosensitive) and VH260 (thermotolerant). Treatments consisted of normal day/night temperatures (32/24 °C) and high night temperatures (32/30 °C) for 2 weeks at flowering (approximately 8 eight weeks after planting). The results indicated that VH260 was more thermotolerant than ST5288 even under conditions of high night temperature stress, as it managed to maintain its net photosynthetic rates, cell membrane integrity, as well as pistil carbohydrate contents and ultimately achieved higher total reproductive weight. It was concluded that heat tolerance of thermotolerant cultivars selected under conditions of high day temperatures is also conserved under high night temperatures, while net photosynthetic rates and cell membrane integrity can be utilized as selection traits for heat tolerance under either high day or night temperatures.

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Temporal Dynamics of Cotton Leaves and Canopies

Cited by 8 publications

References 46 publications

Estimating the Leaf Area of Cotton (Gossypium hirsutum L.) Plants by Means of Relationships between Monopodial and Sympodial Leaves

Estimating the Leaf Area of Cotton (Gossypium hirsutum L.) Plants by Means of Relationships between Monopodial and Sympodial Leaves

High Night Temperatures During the Floral Bud Stage Increase the Abscission of Reproductive Structures in Cotton

Physiological and Biochemical Responses of Two Cotton (Gossypium hirsutum L.) Cultivars Differing in Thermotolerance to High Night Temperatures during Anthesis

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