Central composite design-based analysis of specific leaf area and related agronomic factors in cultivars of rapeseed (Brassica napus L.)

Liu, Tiefang; Zhang, Chunlei; Yang, Guozheng; Wu, Jing; Xie, Guosheng; Zeng, Hanlai; Yin, Changxi; Liu, Tiemei

doi:10.1016/j.fcr.2008.11.001

Cited by 19 publications

(8 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These high initial values of SLA in the first weeks after emergence were most probably due to a pre-determined development pattern, affected only slightly by environmental factors. A similar pattern has been shown to be typical for the early growth stages of many crops (Asch et al 1999;Lafarge & Hammer 2002;Liu et al 2009), since the crops can absorb more radiation for further growth by developing as much leaf area as possible and also profit by suppressing the growth of competing plants, e.g. weeds.…”

Section: Discussionsupporting

confidence: 58%

See 1 more Smart Citation

Specific leaf area development of autumn-sown sugar beet (Beta vulgaris L.) on different sowing dates in northern Germany

Stephan

Böttcher²,

Kage

2015

J. Agric. Sci.

View full text Add to dashboard Cite

In most regions, sugar beet is normally sown as a spring crop. If sown in autumn the crop remains on the field over winter and may achieve fast re-growth in spring from assimilates stored within the beet, allowing earlier leaf growth and light interception in spring. The specific leaf area (SLA) (ratio between leaf surface and leaf mass) is mainly affected by leaf area expansion and consequently affects productivity in early growth stages. The aim of the present study was (i) to examine the SLA dynamics of autumn-sown sugar beet before and after winter and (ii) to develop an empiric approach describing SLA changes during the growth period. A field trial in northern Germany with three different sowing times (mid-April, mid-June and mid-August) and varying plant densities (148 000, 246 000 and 370 000 plants/ha) was carried out in 2009/10 to 2011/12. The average SLA of the canopy was the highest (>25 m 2 /kg) directly after emergence, then decreased until autumn (<13 m 2 /kg) and increased again up to 20 m 2 /kg during re-growth of winter sugar beet in spring. A stepwise multiple regression analysis revealed mean photosynthetically active radiation over 10 days before measurement (PAR mean ), leaf area index (LAI), mean temperature over 10 days before measurement (T mean ) and temperature sum since sowing (T sum ) as the main influences on SLA dynamics. The strongest correlation to SLA was shown by T mean (r = 0·69) and the weakest by T sum (r = −0·28). A multiple linear regression model was fitted to the dataset with T mean , PAR mean and log (T sum ) achieving an adjusted R 2 of 0·64. This empirical equation is suitable for use in a crop growth model for winter sugar beet.

show abstract

Section: Discussionsupporting

confidence: 58%

“…1999; Lafarge & Hammer 2002; Liu et al . 2009), since the crops can absorb more radiation for further growth by developing as much leaf area as possible and also profit by suppressing the growth of competing plants, e.g. weeds.…”

Section: Discussionmentioning

confidence: 99%

Specific leaf area development of autumn-sown sugar beet (Beta vulgaris L.) on different sowing dates in northern Germany

Stephan

Böttcher²,

Kage

2015

J. Agric. Sci.

View full text Add to dashboard Cite

show abstract

“…In contrast, the low SLA in the MG plots suggested that the leaves became thicker than those in the control and probably lasted longer. Meanwhile, leaves accumulated more assimilate per unit area, which would offer some protection against herbivores [36, 44]. At the same time, the steadily decreasing plant height and internode length with increasing grazing intensity produced plants with more of a dwarf phenotype, which may represent a grazing avoidance strategy that protects the plants.…”

Section: Discussionmentioning

confidence: 99%

Differences in the photosynthetic and physiological responses of Leymus chinensis to different levels of grazing intensity

et al. 2019

View full text Add to dashboard Cite

BackgroundGrazing is an important land use in northern China. In general, different grazing intensities had a different impact on the morphological and physiological traits of plants, and especially their photosynthetic capacity. We investigated the responses of Leymus chinensis to light, medium, and heavy grazing intensities in comparison with a grazing exclusion control.ResultsWith light grazing, L. chinensis showed decreased photosynthetic capacity. The low chlorophyll and carotenoid contents constrained light energy transformation and dissipation, and Rubisco activity was also low, restricting the carboxylation efficiency. In addition, the damaged photosynthetic apparatus accumulated reactive oxygen species (ROS). With medium grazing, more energy was used for thermal dissipation, with high carotene content and high non-photochemical quenching, whereas photosynthetic electron transport was lowest. Significantly decreased photosynthesis decreased leaf C contents. Plants decreased the risk caused by ROS through increased energy dissipation. With high grazing intensity, plants changed their strategy to improve survival through photosynthetic compensation. More energy was allocated to photosynthetic electron transport. Though heavy grazing damaged the chloroplast ultrastructure, adjustment of internal mechanisms increased compensatory photosynthesis, and an increased tiller number facilitated regrowth after grazing.ConclusionsOverall, the plants adopted different strategies by adjusting their metabolism and growth in response to their changing environment.

show abstract

“…As a result, invasive plant species at higher invasion degrees invest low biomass in leaf structures per unit area to gain a higher growth rate compared with plants growing at lower invasion degrees. Previous investigations have also found that the biomass investment per unit of leaf area was correlated positively with population density (Liu et al 2009;Tobin et al 2011). Hence, plants growing at higher invasion degrees may allocate less biomass to leaf construction in order to yield high resource acquisition and use efficiency (James & Drenovsky 2007;Shen et al 2011).…”

Section: Acta Botanica Brasilicamentioning

confidence: 91%

Allelopathic suppression by Conyza canadensis depends on the interaction between latitude and the degree of the plant’s invasion

et al. 2017

View full text Add to dashboard Cite

Allelopathic suppression of the growth of co-occurring plant species in invaded ecosystems is an important factor in some plant invasions. Th is study uses leaf extracts of the invasive plant species Conyza canadensis to determine its allelopathic eff ects along a latitudinal gradient, and under diff erent cover classes and degrees of invasion, on seed germination and growth of Lactuca sativa, a sensitive bioindicator of allelochemicals. Th e allelopathic eff ects of C. canadensis on seedling height, root length, seedling biomass, germination percentage, germination potential, germination index, germination rate index, and vigor index of L. sativa increased signifi cantly with increasing latitude. A possible explanation is that the leaves of plants growing in high latitudes secrete a higher concentration of allelochemicals than do leaves of plants growing in low latitudes. Th e allelopathic eff ects of C. canadensis on seedling height, seedling biomass, germination potential, germination index, germination rate index, and vigor index of L. sativa decreased with increasing degree of invasion. Th e more intense allelopathic eff ects of C. canadensis at lower degrees of invasion may enable it to establish populations in ecosystems by inhibiting the seed germination and growth of co-occurring species.

show abstract

Central composite design-based analysis of specific leaf area and related agronomic factors in cultivars of rapeseed (Brassica napus L.)

Cited by 19 publications

References 30 publications

Specific leaf area development of autumn-sown sugar beet (Beta vulgaris L.) on different sowing dates in northern Germany

Specific leaf area development of autumn-sown sugar beet (Beta vulgaris L.) on different sowing dates in northern Germany

Differences in the photosynthetic and physiological responses of Leymus chinensis to different levels of grazing intensity

Allelopathic suppression by Conyza canadensis depends on the interaction between latitude and the degree of the plant’s invasion

Contact Info

Product

Resources

About