Ameliorative effects of potassium on drought-induced decreases in fiber length of cotton (Gossypium hirsutum L.) are associated with osmolyte dynamics during fiber development

Wenqing Zhao, Haoran Dong, Rizwan Zahoor, Zhiguo Zhou, John L. Snider, Yinglong Chen, Kadambot H.M. Siddique, Youhua Wang

Research output: Contribution to journalArticle

Abstract

Fiber length of cotton (Gossypium hirsutum L.) decreases under drought stress, potassium (K) could diminish the decreased caused by drought, but the mechanism associated with this alleviation effect is not clear. We evaluated the effect of K on fiber elongation using two cotton cultivars, Simian 3 and Siza 3, grown in well-watered and drought-stressed conditions. Potassium fertilizer (K2O) was applied 0, 150, or 300 kg ha−1 in each growing condition. Drought stress reduced the final fiber length due to a decline in the maximum rate of rapid elongation (Vmax, mm day−1). The application of K alleviated the drought-induced fiber length reduction by increasing Vmax. At 10 and 15 days post-anthesis (DPA), drought significantly reduced osmotic potential (OP) and increased K+ and malate contents at all K rates, relative to well-watered conditions, which was associated with increased activities of phosphoenolpyruvate carboxylase (PEPC), V-ATPase, PPase, and PM H+-ATPase in cotton fiber. However, the relative contribution of K+ and malate to OP declined under drought in comparison with well-watered condition. Compared with control without K, K application decreased OP and increased the accumulation of osmolytes (K+, malate and soluble sugar) as well as the activities of related enzymes in fiber irrespective of water treatments. Moreover, K application increased osmotic adjustment during drought, and improved the contribution of K+ and malate to OP, especially under drought stress. This study showed that drought decreased fiber length by reducing Vmax, and K application ameliorates the decline in fiber elongation due to drought by enhancing osmolytes accumulation and their contribution to OP in fiber cells.

Original languageEnglish
JournalCrop Journal
DOIs
Publication statusE-pub ahead of print - 6 Jun 2019

Fingerprint

Gossypium hirsutum
cotton
potassium
drought
osmotic pressure
malates
H-transporting ATP synthase
water stress
potassium fertilizers
fiber cells
phosphoenolpyruvate carboxylase
lint cotton
water treatment
flowering
sugars
cultivars
enzymes

Cite this

@article{e1f3e038f3004f1cb9c5ad6055060991,
title = "Ameliorative effects of potassium on drought-induced decreases in fiber length of cotton (Gossypium hirsutum L.) are associated with osmolyte dynamics during fiber development",
abstract = "Fiber length of cotton (Gossypium hirsutum L.) decreases under drought stress, potassium (K) could diminish the decreased caused by drought, but the mechanism associated with this alleviation effect is not clear. We evaluated the effect of K on fiber elongation using two cotton cultivars, Simian 3 and Siza 3, grown in well-watered and drought-stressed conditions. Potassium fertilizer (K2O) was applied 0, 150, or 300 kg ha−1 in each growing condition. Drought stress reduced the final fiber length due to a decline in the maximum rate of rapid elongation (Vmax, mm day−1). The application of K alleviated the drought-induced fiber length reduction by increasing Vmax. At 10 and 15 days post-anthesis (DPA), drought significantly reduced osmotic potential (OP) and increased K+ and malate contents at all K rates, relative to well-watered conditions, which was associated with increased activities of phosphoenolpyruvate carboxylase (PEPC), V-ATPase, PPase, and PM H+-ATPase in cotton fiber. However, the relative contribution of K+ and malate to OP declined under drought in comparison with well-watered condition. Compared with control without K, K application decreased OP and increased the accumulation of osmolytes (K+, malate and soluble sugar) as well as the activities of related enzymes in fiber irrespective of water treatments. Moreover, K application increased osmotic adjustment during drought, and improved the contribution of K+ and malate to OP, especially under drought stress. This study showed that drought decreased fiber length by reducing Vmax, and K application ameliorates the decline in fiber elongation due to drought by enhancing osmolytes accumulation and their contribution to OP in fiber cells.",
keywords = "Cotton (Gossypium hirsutum), Drought stress, Fiber length, Osmolyte, Potassium application",
author = "Wenqing Zhao and Haoran Dong and Rizwan Zahoor and Zhiguo Zhou and Snider, {John L.} and Yinglong Chen and Siddique, {Kadambot H.M.} and Youhua Wang",
year = "2019",
month = "6",
day = "6",
doi = "10.1016/j.cj.2019.03.008",
language = "English",
journal = "The Crop Journal",
issn = "2095-5421",
publisher = "Institute of Crop Sciences (ICS)",

}

Ameliorative effects of potassium on drought-induced decreases in fiber length of cotton (Gossypium hirsutum L.) are associated with osmolyte dynamics during fiber development. / Zhao, Wenqing; Dong, Haoran; Zahoor, Rizwan; Zhou, Zhiguo; Snider, John L.; Chen, Yinglong; Siddique, Kadambot H.M.; Wang, Youhua.

In: Crop Journal, 06.06.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ameliorative effects of potassium on drought-induced decreases in fiber length of cotton (Gossypium hirsutum L.) are associated with osmolyte dynamics during fiber development

AU - Zhao, Wenqing

AU - Dong, Haoran

AU - Zahoor, Rizwan

AU - Zhou, Zhiguo

AU - Snider, John L.

AU - Chen, Yinglong

AU - Siddique, Kadambot H.M.

AU - Wang, Youhua

PY - 2019/6/6

Y1 - 2019/6/6

N2 - Fiber length of cotton (Gossypium hirsutum L.) decreases under drought stress, potassium (K) could diminish the decreased caused by drought, but the mechanism associated with this alleviation effect is not clear. We evaluated the effect of K on fiber elongation using two cotton cultivars, Simian 3 and Siza 3, grown in well-watered and drought-stressed conditions. Potassium fertilizer (K2O) was applied 0, 150, or 300 kg ha−1 in each growing condition. Drought stress reduced the final fiber length due to a decline in the maximum rate of rapid elongation (Vmax, mm day−1). The application of K alleviated the drought-induced fiber length reduction by increasing Vmax. At 10 and 15 days post-anthesis (DPA), drought significantly reduced osmotic potential (OP) and increased K+ and malate contents at all K rates, relative to well-watered conditions, which was associated with increased activities of phosphoenolpyruvate carboxylase (PEPC), V-ATPase, PPase, and PM H+-ATPase in cotton fiber. However, the relative contribution of K+ and malate to OP declined under drought in comparison with well-watered condition. Compared with control without K, K application decreased OP and increased the accumulation of osmolytes (K+, malate and soluble sugar) as well as the activities of related enzymes in fiber irrespective of water treatments. Moreover, K application increased osmotic adjustment during drought, and improved the contribution of K+ and malate to OP, especially under drought stress. This study showed that drought decreased fiber length by reducing Vmax, and K application ameliorates the decline in fiber elongation due to drought by enhancing osmolytes accumulation and their contribution to OP in fiber cells.

AB - Fiber length of cotton (Gossypium hirsutum L.) decreases under drought stress, potassium (K) could diminish the decreased caused by drought, but the mechanism associated with this alleviation effect is not clear. We evaluated the effect of K on fiber elongation using two cotton cultivars, Simian 3 and Siza 3, grown in well-watered and drought-stressed conditions. Potassium fertilizer (K2O) was applied 0, 150, or 300 kg ha−1 in each growing condition. Drought stress reduced the final fiber length due to a decline in the maximum rate of rapid elongation (Vmax, mm day−1). The application of K alleviated the drought-induced fiber length reduction by increasing Vmax. At 10 and 15 days post-anthesis (DPA), drought significantly reduced osmotic potential (OP) and increased K+ and malate contents at all K rates, relative to well-watered conditions, which was associated with increased activities of phosphoenolpyruvate carboxylase (PEPC), V-ATPase, PPase, and PM H+-ATPase in cotton fiber. However, the relative contribution of K+ and malate to OP declined under drought in comparison with well-watered condition. Compared with control without K, K application decreased OP and increased the accumulation of osmolytes (K+, malate and soluble sugar) as well as the activities of related enzymes in fiber irrespective of water treatments. Moreover, K application increased osmotic adjustment during drought, and improved the contribution of K+ and malate to OP, especially under drought stress. This study showed that drought decreased fiber length by reducing Vmax, and K application ameliorates the decline in fiber elongation due to drought by enhancing osmolytes accumulation and their contribution to OP in fiber cells.

KW - Cotton (Gossypium hirsutum)

KW - Drought stress

KW - Fiber length

KW - Osmolyte

KW - Potassium application

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M3 - Article

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