Finding out Relationships Among Some Morpho-Biochemical Parameters of Christ's Thorn (Ziziphus spina-christi) under Drought and Salinity Stresses

Abstract

-Taking into consideration that modeling and indicating relationship among traits and variables are among the most useful numerical techniques in the biological and botanical researches, and also undeniable impact of drought and salinity stresses, this research was implemented with the aim to consider change in relationship among the traits under separately drought and salinity stresses related to scarcely distributed medicinal plant called Christ thorn (Ziziphus spina-christi). A glass house experiment was implemented in controlled conditions at the College of Agriculture, Shiraz University, Shiraz, Iran. Five different water stress levels (irrigation at four, six, eight and 10 days intervals, compared to the unstressed control plants with every even days irrigation) and five salinity stress levels (0, 3.2, 6.4, 9.6 and 12.3 dS m -1 ) were separately induced on plants. Results of this study indicated that salinity and water stresses in addition to their destructive impact on cell and tissue compartment, can adverse and change the relationship among morphological and biochemical parameters in different ways. Cluster analysis could clearly separate traits into two groups under water stress while three groups under salinity stress. Principal component showed that this technique can accounted for a high variation among data under both water and salinity stresses so that it is possible to consider relationship among the traits using principal component in place of classic methods such as correlation coefficients. As result of principal component, it revealed that change in relationship among traits under different stresses is plausible.Keywords: salinity, drought, stepwise regressions, principal component analysis, cluster analysis. (0, 3,2, 6,4, 9,6 e 12,3 dS m -1 RESUMO -Levando-se em consideração que a modelagem e indicação de relações entre os traços e variáveis estão entre as técnicas numéricas mais úteis nas pesquisas biológicas e botânicas, assim como o impacto inegável dos estresses hídrico e salino, esta pesquisa foi realizada com o objetivo de investigar mudanças na relação entre os traços em condições de estresses hídrico e salino, separadamente, relacionados à planta medicinal de distribuição esparsa chamada espinheiro-decristo (Ziziphus spina-christi). Foi conduzido um experimento em estufa, em condições controladas, na Faculdade de Agricultura da Universidade de Shiraz, Shiraz, Iran. Cinco níveis diferentes de estresse hídrico (irrigação nos intervalos de quatro, seis, oito e dez dias, em comparação com as plantas do grupo controle não submetidas a estresse, nos dias pares de irrigação) e cinco níveis de estresse salino

Acuities into tolerance mechanisms via different bioassay during Brassicaceae-Alternaria brassicicola interaction and its impact on yield

“…To prompt diverse aspect of association of several yield variables, different biometrical techniques have been developed. The PC analysis helps researchers to use simple illustrations such as factors loading to describe relationships among each variable under study [52,53]. In the present study, factor loading graph showed close association of yield with different morpho-biochemical and photosynthetic pigments.…”

Seasonal Changes of Some Metabolites in Hyoscyamus boveanus (Dunal) Asch. & Schweinf – Saint Katherine, South Sinai, Egypt

“…In previous studies, the first two PCs indicated to those relationships between the variables, which were interpreted as a related response to some of the soil variables by Islabão et al [24] as well as to some soil and plant variables by Juhos et al [25], Ferraz et al [26] and Gil et al [94]. PCA indicated that changes in the relationship between variables under different stresses are reasonable [72].…”

“…The water content % in plants is the most important physiological measure that affects the efficiency of photosynthesis, plant growth and biomass productivity, in addition to being an indicator of plant tolerance to drought and salinity, because water stress restricts transpiration, including stomata closure and water evaporation from the leaf surface [35]. Some chemical compositions such as K + and Na + revealed higher variation under salinity stress while some other chemical compositions like nitrogen showed higher variation under drought stress [72]. When stress intensity increases, the minerals uptake by the plant may decrease [73] and it was also found that some minerals in plants are reduced due to other minerals [21].…”

Arbuscular mycorrhizal strategy for zinc mycoremediation and diminished translocation to shoots and grains in wheat

“…The plants were separated into shoots and roots and a part of the roots and fresh shoots were immediately frozen in liquid nitrogen for analysis. The dry weight of the plant was estimated by placing the samples in an oven at 60°C until obtaining a constant dry weight [ 63 ]. In addition, some of wheat were harvested at the ripening stage to record the yield component data, which included: plant height (cm), days to flowering, days to maturity, spike length (cm), grain yield (g plant -1 ), biological yield (g plant -1 ), weight of 100 grams (g), number of grains / spike [ 64 ].…”