<b><i>Lonchocarpus cultratus</i> (Vell.) A.V.G. Azevedo &amp; H.C. Lima (Fabaceae) growth under different shade and water availability conditions</b>

Barbeiro, Caroline; Romagnolo, Mariza Barion; Pastorini, Lindamir Hernandez

doi:10.1590/0034-737X201865060004

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Physiology and Morphology Applied to Agriculture • Rev. Ceres 65 (06) • Nov-Dec 2018 • https://doi.org/10.1590/0034-737X201865060004 copy

Lonchocarpus cultratus (Vell.) A.V.G. Azevedo & H.C. Lima (Fabaceae) growth under different shade and water availability conditions ¹ Research financed by CNPq.

Crescimento de Lonchocarpus cultratus (Vell.) A.V.G. Azevedo & H.C. Lima (Fabaceae) mantidos em diferentes condições de sombreamento e disponibilidade hídrica

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Light and water availability are among the environmental factors that most influence plant growth and development. The ability to acclimate to shade and tolerate drought can be assessed by growth characteristics. Thus, the objective of this study was to analyze the effect of water availability and shading on the initial growth of Lonchocarpus cultratus, a tree species, common name ‘embira-de-sapo’, abundant in several areas of South and Southeastern Brazil. The experiment was arranged in a 3x2 factorial completely randomized design. The plants were kept under 0%, 50%, and 80% shading and two conditions of water availability (daily irrigation - ID and twice a week - NDI). The variables height, root length, dry biomass of leaves, stem, and root were evaluated at 30, 60 and 90 days after emergence (DAE). Total, a, and b chlorophyll, mycorrhizal colonization, and nodulation were determined. Death of young plants maintained at 0% NDI occurred at the beginning of growth. At 90 DAE, plants kept under 80% shading and ID showed the highest height and etiolated plants due to the reduction of light intensity in this treatment. Over the experimental period, 0% and 50% shaded plants irrigated daily had the highest percentage of mycorrhizal colonization, and nodulation was observed in all plants regardless of the treatment.

Keywords:
leaf area; chlorophyll; mycorrhizal colonization; dry biomass; nodulation

		H (cm)		RL (cm)		DLB (g)		DSB (g)		DRB (g)
		ID	NDI	ID	NDI	ID	NDI	ID	NDI	ID	NDI
30 DAE	0%	9.6 a*	7.33 a	19.10 a	13.30 a	0.102 a	-	0.074 a	-	0.052 a	-
	50%	11.0 a	7.30 a	12.56 a	15.10 a	0.086 a	0.036 b	0.056 ab	0.016 c	0.022 b	0.017 b
	80%	10.4 a	13.1 a	14.60 a	12.10 a	0.076 a	0.093 a	0.048 ab	0.053 ab	0.015 b	0.019 b
60 DAE	0%	9.00 b	6.86 c	15.7 a	13.46 a	0.110 b	-	0.033 ab	-	0.058 a	-
	50%	12.74 ab	13.30 a	20.6 a	17.4 a	0.187 a	0.133 ab	0.053 a	0.034 ab	0.059 a	0.039 a
	80%	16.82 a	12.50 ab	13.4 a	14.8 a	0.164 ab	0.102 b	0.042 ab	0.021 b	0.034 a	0.027 a
90 DAE	0%	10.00 b	-	19.38 a	-	0.151 ab	-	0.058 a	-	0.091 a	-
	50%	11.50 b	9.66 b	17.22 a	14.70 a	0.186 a	0.065 b	0.073 a	0.037 a	0.070 ab	0.024 b
	80%	15.70 a	11.74 b	14.00 a	14.70 a	0.136 ab	0.123 ab	0.039 a	0.062 a	0.032 ab	0.029 b

Treatment/DAT	30	60	90
0% ID	8.408 BC*	6.764 B	4.106 B
50% ID	9.083 ABC	12.240 A	6.924 AB
50% NDI	6.311 C	10.723 A	4.989 AB
80% ID	11.595 A	13.930 A	7.798 A
80% NDI	12.492 A	12.910 A	5.928 AB

Universidade Federal de Viçosa Av. Peter Henry Rolfs, s/n, 36570-000 Viçosa, Minas Gerais Brasil, Tel./Fax: (55 31) 3612-2078 - Viçosa - MG - Brazil
E-mail: ceres@ufv.br

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[1] *Corresponding author: lhpastorini@uem.br

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Lonchocarpus cultratus (Vell.) A.V.G. Azevedo & H.C. Lima (Fabaceae) growth under different shade and water availability conditions 1 Research financed by CNPq.

Crescimento de Lonchocarpus cultratus (Vell.) A.V.G. Azevedo & H.C. Lima (Fabaceae) mantidos em diferentes condições de sombreamento e disponibilidade hídrica

ABSTRACT

Lonchocarpus cultratus (Vell.) A.V.G. Azevedo & H.C. Lima (Fabaceae) growth under different shade and water availability conditions ¹ Research financed by CNPq.