Compensatory growth mechanisms in lettuce plants after partial defoliation

ABSTRACT Leaf area loss is a frequent problem in crops, and it can be caused by biotic or abiotic factors. Reduced leaf area can produce alterations in plants, affecting their metabolism, growth, and yield. The leaf area in lettuce plants (Lactuca sativa L.) is often affected by herbivores such as s...

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Autores principales:	Casierra-Posada,Fánor, Zapata-Casierra,Valentina, Baker-Rodríguez,Stefannie Tatiana
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2021
Materias:	Biomass chlorophyll growth herbivores slugs.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000200246
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spelling	oai:scielo:S0718-583920210002002462021-05-28Compensatory growth mechanisms in lettuce plants after partial defoliationCasierra-Posada,FánorZapata-Casierra,ValentinaBaker-Rodríguez,Stefannie Tatiana Biomass chlorophyll growth herbivores slugs. ABSTRACT Leaf area loss is a frequent problem in crops, and it can be caused by biotic or abiotic factors. Reduced leaf area can produce alterations in plants, affecting their metabolism, growth, and yield. The leaf area in lettuce plants (Lactuca sativa L.) is often affected by herbivores such as slugs. The effects of partial defoliation on the growth of lettuce plants were evaluated under greenhouse conditions in Tunja, Colombia. Some plants had half of their leaves removed, while others were left intact as a control. The variables normally used in the basic analysis of plant growth were evaluated. There was nonsignificant difference between the two treatments; however, lettuce plants showed a remarkable ability to reduce the negative effect caused by partial defoliation, and they managed to maintain a balance in the root to shoot ratio, leaf area ratio, specific leaf area, leaf weight ratio, DM partitioning, and harvestable DM. Partial defoliation decreased the absolute growth rate by 17.8% and the relative growth rate by 13.8%. Additionally, the chlorophyll content index and the number of leaves increased by 16.0% and 15.4%, respectively, in plants subjected to partial defoliation compared with the control plants. These results indicate the regeneration capacity of the plants after partial defoliation.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.81 n.2 20212021-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000200246en10.4067/S0718-58392021000200246
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Biomass chlorophyll growth herbivores slugs.
spellingShingle	Biomass chlorophyll growth herbivores slugs. Casierra-Posada,Fánor Zapata-Casierra,Valentina Baker-Rodríguez,Stefannie Tatiana Compensatory growth mechanisms in lettuce plants after partial defoliation
description	ABSTRACT Leaf area loss is a frequent problem in crops, and it can be caused by biotic or abiotic factors. Reduced leaf area can produce alterations in plants, affecting their metabolism, growth, and yield. The leaf area in lettuce plants (Lactuca sativa L.) is often affected by herbivores such as slugs. The effects of partial defoliation on the growth of lettuce plants were evaluated under greenhouse conditions in Tunja, Colombia. Some plants had half of their leaves removed, while others were left intact as a control. The variables normally used in the basic analysis of plant growth were evaluated. There was nonsignificant difference between the two treatments; however, lettuce plants showed a remarkable ability to reduce the negative effect caused by partial defoliation, and they managed to maintain a balance in the root to shoot ratio, leaf area ratio, specific leaf area, leaf weight ratio, DM partitioning, and harvestable DM. Partial defoliation decreased the absolute growth rate by 17.8% and the relative growth rate by 13.8%. Additionally, the chlorophyll content index and the number of leaves increased by 16.0% and 15.4%, respectively, in plants subjected to partial defoliation compared with the control plants. These results indicate the regeneration capacity of the plants after partial defoliation.
author	Casierra-Posada,Fánor Zapata-Casierra,Valentina Baker-Rodríguez,Stefannie Tatiana
author_facet	Casierra-Posada,Fánor Zapata-Casierra,Valentina Baker-Rodríguez,Stefannie Tatiana
author_sort	Casierra-Posada,Fánor
title	Compensatory growth mechanisms in lettuce plants after partial defoliation
title_short	Compensatory growth mechanisms in lettuce plants after partial defoliation
title_full	Compensatory growth mechanisms in lettuce plants after partial defoliation
title_fullStr	Compensatory growth mechanisms in lettuce plants after partial defoliation
title_full_unstemmed	Compensatory growth mechanisms in lettuce plants after partial defoliation
title_sort	compensatory growth mechanisms in lettuce plants after partial defoliation
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000200246
work_keys_str_mv	AT casierraposadafanor compensatorygrowthmechanismsinlettuceplantsafterpartialdefoliation AT zapatacasierravalentina compensatorygrowthmechanismsinlettuceplantsafterpartialdefoliation AT bakerrodriguezstefannietatiana compensatorygrowthmechanismsinlettuceplantsafterpartialdefoliation
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Compensatory growth mechanisms in lettuce plants after partial defoliation

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