Leaf structure and ultrastructure changes induced by heat stress and drought during seed filling in field - grown soybean and their relationship with grain yield
Studies focusing on terminal drought combined with heat impacts on plants of agronomic value remain scarce, and even less under field conditions. The objective of this study was to investigate leaf structural and ultrastructural changes induced by heat stress (HS) and drought stress (DS) during seed fi lling and their relationship with physiological variables and yield determination. Two soybean cultivars were grown in field conditions. During seed filling four treatments were applied, including a control (without manipulation, at ambient temperature and field capacity), HS (episodes exceeding 32°C for 6 h d-1) during 21-d, DS (20% of field capacity soil water content) during 35-d, and HS×DS. Drought principally reduced leaf area, whereas heat decreased leaf thickness, possible as acclimation strategies, but also irreversible reducing CO2 assimilation sites. Both stresses damaged the outer and inner membranes of chloroplasts, causing swollen chloroplasts and accumulation of plastoglobules, loss of chlorophyll content, and negatively affecting chlorophyll fl uorescence. Thus, the performance and integrity of the photosynthetic machinery were reduced. Through a morpho-functional perspective and a holistic multiscale approach, our results provide evidence of photosynthesis impairment and yield drops under stressful conditions which were associated with structural and ultrastructural (particularly at the level of chloroplasts) modifi cations of leaves.
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| Subjects: | EPISODES OF HIGH TEMPERATURES, LATE REPRODUCTIVE DEVELOPMENT, LEAF MORPHOANATOMY, LEAF PHOTOSYNTHESIS PERFORMANCE, SEED NUMBER AND WEIGHT, WATER DEFICIT, , |
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KOHA-OAI-AGRO:549662023-12-05T12:08:18Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=54966http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=AAGLeaf structure and ultrastructure changes induced by heat stress and drought during seed filling in field - grown soybean and their relationship with grain yieldCarrera, Constanza SoledadSolís, Stella MarisFerrucci, María SilviaVega, Claudia Rosa CeciliaGalati, Beatriz GloriaErgo, VerónicaAndrade, Fernando HéctorLascano, Hernán Ramirotextengapplication/pdfStudies focusing on terminal drought combined with heat impacts on plants of agronomic value remain scarce, and even less under field conditions. The objective of this study was to investigate leaf structural and ultrastructural changes induced by heat stress (HS) and drought stress (DS) during seed fi lling and their relationship with physiological variables and yield determination. Two soybean cultivars were grown in field conditions. During seed filling four treatments were applied, including a control (without manipulation, at ambient temperature and field capacity), HS (episodes exceeding 32°C for 6 h d-1) during 21-d, DS (20% of field capacity soil water content) during 35-d, and HS×DS. Drought principally reduced leaf area, whereas heat decreased leaf thickness, possible as acclimation strategies, but also irreversible reducing CO2 assimilation sites. Both stresses damaged the outer and inner membranes of chloroplasts, causing swollen chloroplasts and accumulation of plastoglobules, loss of chlorophyll content, and negatively affecting chlorophyll fl uorescence. Thus, the performance and integrity of the photosynthetic machinery were reduced. Through a morpho-functional perspective and a holistic multiscale approach, our results provide evidence of photosynthesis impairment and yield drops under stressful conditions which were associated with structural and ultrastructural (particularly at the level of chloroplasts) modifi cations of leaves.Studies focusing on terminal drought combined with heat impacts on plants of agronomic value remain scarce, and even less under field conditions. The objective of this study was to investigate leaf structural and ultrastructural changes induced by heat stress (HS) and drought stress (DS) during seed fi lling and their relationship with physiological variables and yield determination. Two soybean cultivars were grown in field conditions. During seed filling four treatments were applied, including a control (without manipulation, at ambient temperature and field capacity), HS (episodes exceeding 32°C for 6 h d-1) during 21-d, DS (20% of field capacity soil water content) during 35-d, and HS×DS. Drought principally reduced leaf area, whereas heat decreased leaf thickness, possible as acclimation strategies, but also irreversible reducing CO2 assimilation sites. Both stresses damaged the outer and inner membranes of chloroplasts, causing swollen chloroplasts and accumulation of plastoglobules, loss of chlorophyll content, and negatively affecting chlorophyll fl uorescence. Thus, the performance and integrity of the photosynthetic machinery were reduced. Through a morpho-functional perspective and a holistic multiscale approach, our results provide evidence of photosynthesis impairment and yield drops under stressful conditions which were associated with structural and ultrastructural (particularly at the level of chloroplasts) modifi cations of leaves.EPISODES OF HIGH TEMPERATURESLATE REPRODUCTIVE DEVELOPMENTLEAF MORPHOANATOMYLEAF PHOTOSYNTHESIS PERFORMANCESEED NUMBER AND WEIGHTWATER DEFICITAnais Da Academia Brasileira de Ciencias |
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| topic |
EPISODES OF HIGH TEMPERATURES LATE REPRODUCTIVE DEVELOPMENT LEAF MORPHOANATOMY LEAF PHOTOSYNTHESIS PERFORMANCE SEED NUMBER AND WEIGHT WATER DEFICIT EPISODES OF HIGH TEMPERATURES LATE REPRODUCTIVE DEVELOPMENT LEAF MORPHOANATOMY LEAF PHOTOSYNTHESIS PERFORMANCE SEED NUMBER AND WEIGHT WATER DEFICIT |
| spellingShingle |
EPISODES OF HIGH TEMPERATURES LATE REPRODUCTIVE DEVELOPMENT LEAF MORPHOANATOMY LEAF PHOTOSYNTHESIS PERFORMANCE SEED NUMBER AND WEIGHT WATER DEFICIT EPISODES OF HIGH TEMPERATURES LATE REPRODUCTIVE DEVELOPMENT LEAF MORPHOANATOMY LEAF PHOTOSYNTHESIS PERFORMANCE SEED NUMBER AND WEIGHT WATER DEFICIT Carrera, Constanza Soledad Solís, Stella Maris Ferrucci, María Silvia Vega, Claudia Rosa Cecilia Galati, Beatriz Gloria Ergo, Verónica Andrade, Fernando Héctor Lascano, Hernán Ramiro Leaf structure and ultrastructure changes induced by heat stress and drought during seed filling in field - grown soybean and their relationship with grain yield |
| description |
Studies focusing on terminal drought combined with heat impacts on plants of agronomic value remain scarce, and even less under field conditions.
The objective of this study was to investigate leaf structural and ultrastructural changes induced by heat stress (HS) and drought stress (DS) during seed fi lling and their relationship with physiological variables and yield determination.
Two soybean cultivars were grown in field conditions. During seed filling four treatments were applied, including a control (without manipulation, at ambient temperature and field capacity), HS (episodes exceeding 32°C for 6 h d-1) during 21-d, DS (20% of field capacity soil water content) during 35-d, and HS×DS.
Drought principally reduced leaf area, whereas heat decreased leaf thickness, possible as acclimation strategies, but also irreversible reducing CO2 assimilation sites.
Both stresses damaged the outer and inner membranes of chloroplasts, causing swollen chloroplasts and accumulation of plastoglobules, loss of chlorophyll content, and negatively affecting chlorophyll fl uorescence. Thus, the performance and integrity of the photosynthetic machinery were reduced. Through a morpho-functional perspective and a holistic multiscale approach, our results provide evidence of photosynthesis impairment and yield drops under stressful conditions which were associated with structural and ultrastructural (particularly at the level of chloroplasts) modifi cations of leaves. |
| format |
Texto |
| topic_facet |
EPISODES OF HIGH TEMPERATURES LATE REPRODUCTIVE DEVELOPMENT LEAF MORPHOANATOMY LEAF PHOTOSYNTHESIS PERFORMANCE SEED NUMBER AND WEIGHT WATER DEFICIT |
| author |
Carrera, Constanza Soledad Solís, Stella Maris Ferrucci, María Silvia Vega, Claudia Rosa Cecilia Galati, Beatriz Gloria Ergo, Verónica Andrade, Fernando Héctor Lascano, Hernán Ramiro |
| author_facet |
Carrera, Constanza Soledad Solís, Stella Maris Ferrucci, María Silvia Vega, Claudia Rosa Cecilia Galati, Beatriz Gloria Ergo, Verónica Andrade, Fernando Héctor Lascano, Hernán Ramiro |
| author_sort |
Carrera, Constanza Soledad |
| title |
Leaf structure and ultrastructure changes induced by heat stress and drought during seed filling in field - grown soybean and their relationship with grain yield |
| title_short |
Leaf structure and ultrastructure changes induced by heat stress and drought during seed filling in field - grown soybean and their relationship with grain yield |
| title_full |
Leaf structure and ultrastructure changes induced by heat stress and drought during seed filling in field - grown soybean and their relationship with grain yield |
| title_fullStr |
Leaf structure and ultrastructure changes induced by heat stress and drought during seed filling in field - grown soybean and their relationship with grain yield |
| title_full_unstemmed |
Leaf structure and ultrastructure changes induced by heat stress and drought during seed filling in field - grown soybean and their relationship with grain yield |
| title_sort |
leaf structure and ultrastructure changes induced by heat stress and drought during seed filling in field - grown soybean and their relationship with grain yield |
| url |
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=54966 http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= |
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