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Photosynthetic characteristics of the subtending leaf of cotton boll at different fruiting branch nodes and their relationships with lint yield and fiber quality.

Liu J, Meng Y, Lv F, Chen J, Ma Y, Wang Y, Chen B, Zhang L, Zhou Z - Front Plant Sci (2015)

Bottom Line: To investigate photosynthetic characteristics of the subtending leaf at the 2-3rd and 10-11th fruiting branch (FBN, FB2-3, and FB10-11), and their relationship with cotton yield and quality, field experiments were conducted using two cotton cultivars, Kemian 1 and Sumian 15.The results showed that with FBN increasing, chlorophyll (Chl) components, Pn and non-photochemical quenching (NPQ) in the subtending leaf significantly declined, while soluble sugar, amino acid and their ratio (C SS/C AA) as well as F v/F m increased.These results indicated that (1) non-radiative dissipation of excess light energy at FB2-3 was reduced to improve solar energy utilization efficiency to compensate for lower Pn, (2) higher NPQ at FB10-11 played a role in leaf photo-damage avoidance, (3) boll weight was related to the C SS/C AA ratio rather than carbohydrates content alone, (4) with FBN increasing, lint biomass and lint/seed ratio increased significantly, but lint yield decreased due to lower relative amount of bolls, and (5) the decreases in Pn, sucrose content and C SS /C AA in the subtending leaf at FB2-3 resulted in lower boll weight and fiber strength.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University Nanjing, China ; State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences Anyang, China.

ABSTRACT
To investigate photosynthetic characteristics of the subtending leaf at the 2-3rd and 10-11th fruiting branch (FBN, FB2-3, and FB10-11), and their relationship with cotton yield and quality, field experiments were conducted using two cotton cultivars, Kemian 1 and Sumian 15. The results showed that with FBN increasing, chlorophyll (Chl) components, Pn and non-photochemical quenching (NPQ) in the subtending leaf significantly declined, while soluble sugar, amino acid and their ratio (C SS/C AA) as well as F v/F m increased. These results indicated that (1) non-radiative dissipation of excess light energy at FB2-3 was reduced to improve solar energy utilization efficiency to compensate for lower Pn, (2) higher NPQ at FB10-11 played a role in leaf photo-damage avoidance, (3) boll weight was related to the C SS/C AA ratio rather than carbohydrates content alone, (4) with FBN increasing, lint biomass and lint/seed ratio increased significantly, but lint yield decreased due to lower relative amount of bolls, and (5) the decreases in Pn, sucrose content and C SS /C AA in the subtending leaf at FB2-3 resulted in lower boll weight and fiber strength.

No MeSH data available.


Schematic diagram of cotton physiological age in 2009 and 2011 adapted from Liu et al. (2014).
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Figure 1: Schematic diagram of cotton physiological age in 2009 and 2011 adapted from Liu et al. (2014).

Mentions: Meteorological data during boll development was obtained from Nanjing Meteorological Station. The growth and development conditions of bolls and their subtending leaves at different FBN (FB10–11 and FB2–3) were similar at the same flowering time for cotton plants (Table 1). Cotton plants at FB2–3 were characterized as physiologically young cotton (TFB12) and those at FB10–11 as physiologically old cotton (TFB16; Figure 1) (Liu et al., 2014).


Photosynthetic characteristics of the subtending leaf of cotton boll at different fruiting branch nodes and their relationships with lint yield and fiber quality.

Liu J, Meng Y, Lv F, Chen J, Ma Y, Wang Y, Chen B, Zhang L, Zhou Z - Front Plant Sci (2015)

Schematic diagram of cotton physiological age in 2009 and 2011 adapted from Liu et al. (2014).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4584985&req=5

Figure 1: Schematic diagram of cotton physiological age in 2009 and 2011 adapted from Liu et al. (2014).
Mentions: Meteorological data during boll development was obtained from Nanjing Meteorological Station. The growth and development conditions of bolls and their subtending leaves at different FBN (FB10–11 and FB2–3) were similar at the same flowering time for cotton plants (Table 1). Cotton plants at FB2–3 were characterized as physiologically young cotton (TFB12) and those at FB10–11 as physiologically old cotton (TFB16; Figure 1) (Liu et al., 2014).

Bottom Line: To investigate photosynthetic characteristics of the subtending leaf at the 2-3rd and 10-11th fruiting branch (FBN, FB2-3, and FB10-11), and their relationship with cotton yield and quality, field experiments were conducted using two cotton cultivars, Kemian 1 and Sumian 15.The results showed that with FBN increasing, chlorophyll (Chl) components, Pn and non-photochemical quenching (NPQ) in the subtending leaf significantly declined, while soluble sugar, amino acid and their ratio (C SS/C AA) as well as F v/F m increased.These results indicated that (1) non-radiative dissipation of excess light energy at FB2-3 was reduced to improve solar energy utilization efficiency to compensate for lower Pn, (2) higher NPQ at FB10-11 played a role in leaf photo-damage avoidance, (3) boll weight was related to the C SS/C AA ratio rather than carbohydrates content alone, (4) with FBN increasing, lint biomass and lint/seed ratio increased significantly, but lint yield decreased due to lower relative amount of bolls, and (5) the decreases in Pn, sucrose content and C SS /C AA in the subtending leaf at FB2-3 resulted in lower boll weight and fiber strength.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University Nanjing, China ; State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences Anyang, China.

ABSTRACT
To investigate photosynthetic characteristics of the subtending leaf at the 2-3rd and 10-11th fruiting branch (FBN, FB2-3, and FB10-11), and their relationship with cotton yield and quality, field experiments were conducted using two cotton cultivars, Kemian 1 and Sumian 15. The results showed that with FBN increasing, chlorophyll (Chl) components, Pn and non-photochemical quenching (NPQ) in the subtending leaf significantly declined, while soluble sugar, amino acid and their ratio (C SS/C AA) as well as F v/F m increased. These results indicated that (1) non-radiative dissipation of excess light energy at FB2-3 was reduced to improve solar energy utilization efficiency to compensate for lower Pn, (2) higher NPQ at FB10-11 played a role in leaf photo-damage avoidance, (3) boll weight was related to the C SS/C AA ratio rather than carbohydrates content alone, (4) with FBN increasing, lint biomass and lint/seed ratio increased significantly, but lint yield decreased due to lower relative amount of bolls, and (5) the decreases in Pn, sucrose content and C SS /C AA in the subtending leaf at FB2-3 resulted in lower boll weight and fiber strength.

No MeSH data available.